Vertebrate skeletal system (bird). Learn about the backbone and body structure of birds. Sealed in resin, making it easy to observe, handle, and store. 5.3" x 3.5" x 0.9". Weight: 0.8 lbs.
Set of five metal cylinders with hooks: aluminum, copper, iron, lead and zinc, each 15mm in diameter and 100 gm weight. Cylinders vary in length.
Set of five metal cylinders with hooks: aluminum, copper, iron, lead and zinc, each 15mm in diameter and 100 gm weight. Cylinders vary in length.
An economically priced Spectrometer, but capable of performing most of the experiments like spectras, angle of prisms, refractive indexes etc. Consists of heavy base with 170 mm diameter circle, divided 0 to 360 degrees, which rotates independently and has locking screw. Collimator: Fixed, with adjustable axis, objective lens with focusing system, variable aperture slit. Telescope: Moveable with set screw and fine motion screw, adjustable axis. Telescope pillar carries vernier scale for accurate measurements. Focusable objective Lens. Ramsden Eyepiece with cross-wires and locking ring for focus lock. Prism Table: Provided with three leveling screws and engraved lines for prism placement in experiments. Comes complete with Prism Clamp, Grating Holder, Tommy Bar for axis adjustment and Instruction Sheet.
An economically priced Spectrometer, but capable of performing most of the experiments like spectras, angle of prisms, refractive indexes etc. Consists of heavy base with 170 mm diameter circle, divided 0 to 360 degrees, which rotates independently and has locking screw. Collimator: Fixed, with adjustable axis, objective lens with focusing system, variable aperture slit. Telescope: Moveable with set screw and fine motion screw, adjustable axis. Telescope pillar carries vernier scale for accurate measurements. Focusable objective Lens. Ramsden Eyepiece with cross-wires and locking ring for focus lock. Prism Table: Provided with three leveling screws and engraved lines for prism placement in experiments. Comes complete with Prism Clamp, Grating Holder, Tommy Bar for axis adjustment and Instruction Sheet.
Discover how scientists are able to learn about the world around us by studying how light interacts with matter. Spectrophotometry gives students an understanding of the principles of spectral analysis and explains the relationship between absorbance and transmittance. Students then go inside the lab to put this information into action as they perform serial dilutions, develop a standard curve and determine the concentration of aspirin in two unknown solutions using a spectrophotometer. In the process, they use proper scientific procedures and come to understand that measurement errors may affect calculations. Part of the multivolume Science Lab Investigations! DVD Series. Includes a Teacher's Guide.
To study Spectral Lines of Pure Elements / Gases. Gas under pressure in the tubes is used to produce a light for spectral analysis. Brightness of light depends on the nature of gas. Optimum intensity, line resolution and longer life. Metal ends with long life electrodes. About 26 cm long, with 90 -100 mm of central capillary. For intermittent use only, not to be used as a lamp source. These are designed to operate 30 seconds ON~30 seconds OFF. Need Spectrum Tube Power Supply or an Induction Coil, sold separately.
To study Spectral Lines of Pure Elements / Gases. Gas under pressure in the tubes is used to produce a light for spectral analysis. Brightness of light depends on the nature of gas. Optimum intensity, line resolution and longer life. Metal ends with long life electrodes. About 26 cm long, with 90 -100 mm of central capillary. For intermittent use only, not to be used as a lamp source. These are designed to operate 30 seconds ON~30 seconds OFF. Need Spectrum Tube Power Supply or an Induction Coil, sold separately.
• 12" galvanized spike and washer
• For permanent light duty installation
12" Galvanized spike and washer (for permanent light duty installation)
Huge, metal construction. Baked shoving hammertone finish. Shows that pressure of a liquid depends on the depth/height. Measures 16 1/2" from bottom of base to top of cylinder
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "All Visitors Must Report to Office" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “All Visitors Must Report to Office” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "Caution, Children Crossing Ahead" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “Caution, Children Crossing Ahead” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "Do Not Enter" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “Do Not Enter” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "Do Not Enter" printed red on white on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “Do Not Enter” printed red on white on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "Drop Off Only" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “Drop Off Only” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "Enter Here" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “Enter Here” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "EVENT PARKING" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
These collapsible signs are molded hollow to be internally weighted down with sand. Most of the weight is at the bottom where it acts like an anchor. Ships UPS or FedEx ground. Extremely durable and printed on both sides. Overall size = 25" Wide x 36" High. Legend area measure 24" x 24". Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "Lot Full" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “Lot Full” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "NO IDLING ZONE" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
These collapsible signs are molded hollow to be internally weighted down with sand. Most of the weight is at the bottom where it acts like an anchor. Ships UPS or FedEx ground. Extremely durable and printed on both sides. Overall size = 25" Wide x 36" High. Legend area measure 24" x 24". Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "No Parking" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “No Parking” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "No Parking / Buses Only" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “No Parking / Buses Only” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "No Pick Up / No Drop Off" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “No Pick Up / No Drop Off” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "Pick Up Only" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “Pick Up Only” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in blank legend area
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Small in stature but large sign display area of 24' wide x 24' high is great to advertise games, concerts, plays or any advertising where a smaller sign is need but big visibility. Available in yellow only. Overall Size 25' wide x 36' high
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "PULL FORWARD" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
These collapsible signs are molded hollow to be internally weighted down with sand. Most of the weight is at the bottom where it acts like an anchor. Ships UPS or FedEx ground. Extremely durable and printed on both sides. Overall size = 25" Wide x 36" High. Legend area measure 24" x 24". Ships UPS or FedEx Ground.
• All Plastic Sign Frame
• 24in x 24in legend area
• Has "School Bus Loading / Unloading" printed on both sides
• Regressed sign area helps to protect sign faces
• Features “click lock” hinges for a positive interlock in the open position
• Can be internally ballasted with sand
• Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces
• Outside Dimensions: 36”H X 25”W x 3”D
• Weight: 17 lbs.
Molded all plastic hollow sign frame that can be internally weighted down with sand. Only 3 or 4 pounds is recommended per leg. Most of the weight is at the bottom where it acts like an anchor. They are extremely durable. Stacking lugs facilitate handling by keeping stacked units from sliding and damaging sign faces. Features “click lock” hinges for a positive interlock in the open position. Legend area measure 24in x 24in. “School Bus Loading / Unloading” printed on both sides. Outside Dimensions: 36”H X 25”W x 3”D. Weight: 17 lbs. Ships UPS or FedEx Ground.