Graduated Interval: 25ml These bottles are made of translucent and unbreakable low density polyethylene. The distinguishing feature that these bottles contain is the built-in delivery tube making it a one-piece wash bottle. These bottles are graduated on the outer surface to reflect an approximate volume of solution filled or dispensed.
Graduated Interval: 50ml These bottles are made of translucent and unbreakable low density polyethylene. The distinguishing feature that these bottles contain is the built-in delivery tube making it a one-piece wash bottle. These bottles are graduated on the outer surface to reflect an approximate volume of solution filled or dispensed.
• Personal Protective Equipment
• Eye Protection
• Bouton Goggles
Soft vinyl frame with 184 perforations for maximum ventilation. Optical quality, distortion free lenses. Adjustable elastic band. Easily fits over glasses. One size fits all.
Economical metal vernier caliper with 140mm capacity. Features inside and outside jaws, full length depth gauge, friction ruler and sliding lock for gauging. Graduated in millimeter and 1/16th of an inch.
Economical metal vernier caliper with 140mm capacity. Features inside and outside jaws, full length depth gauge, friction ruler and sliding lock for gauging. Graduated in millimeter and 1/16th of an inch.
• One of our most popular vests for over 20 years
• Durable Vinyl coated mesh
• Hook/loop side closures
• Reflective panels front & back
• CROSSING GUARD printed on front and back
• Available in 2 sizes
Absolutely the finest safety vest on the market. Durable fluorescent orange woven vinyl-coated with Reflexite Prismatic tape front and back with printed legend CROSSING GUARD. Vertical stripes over shoulders and on hook-and-loop adjustable belts provide 360 degrees of reflective visibility. Hoop-and-loop front closure.
• Front and back of the vest is 18 inches across from side to side
• 12 inch belts on each side for adjustability
• Measures 48 inches or 57 inches from bottom hem on the front across the shoulders to bottom hem on the back
• One of our most popular vests for over 20 years
• Durable Vinyl coated mesh
• Hook/loop side closures
• Reflective panels front & back
• CROSSING GUARD printed on front and back
Absolutely the finest safety vest on the market. Durable fluorescent orange woven vinyl-coated with Reflexite Prismatic tape front and back with printed legend CROSSING GUARD. Vertical stripes over shoulders and on hook-and-loop adjustable belts provide 360 degrees of reflective visibility. Hoop-and-loop front closure.
• Front and back of the vest is 18 inches across from side to side
• 12 inch belts on each side for adjustability
• Measures 48 inches from bottom hem on the front across the shoulders to bottom hem on the back
• Eyepieces - 10X WF Pointer
• Focus - Separate Coarse & Fine
• Objectives - 4X, 10X, 40XR
• Magnification - 40X, 100X, 400X
• Head - Monocular
• Stage - Standard Stage 0.065 Condenser & Disc Diaphragm
• Illumination - LED w/ Power Cord Sturdy, well-balanced, aluminum
The Walter WP-A-LED is a rugged, classroom-ready compound microscope designed for dependable use in middle school, high school, and introductory laboratory settings. Its durable all-metal construction provides a stable platform for viewing prepared specimens, while separate coarse and fine focusing controls allow students to bring specimens into sharp focus.
A 10X wide-field eyepiece with pointer combines with three achromatic objectives—4X, 10X, and 40XR—to provide 40X, 100X, and 400X magnification. The retractable 40X objective helps protect slides and the objective during close focusing.
The standard stage features spring-loaded clips for securing slides, while the built-in 0.65 N.A. condenser and 5-aperture disc diaphragm provide straightforward control of illumination for different specimens and magnifications. Integrated LED illumination provides a bright, consistent light source without the heat and frequent bulb replacement associated with traditional incandescent microscope lamps.
Designed with the demands of student laboratories in mind, the WP-A-LED combines simple operation, durable construction, and the magnification range needed for a wide variety of biology and life-science activities.
Key Features: 10X wide-field eyepiece with pointer; 4X, 10X and retractable 40X achromatic objectives; 40X–400X total magnification; separate coarse and fine focus; standard stage with spring-loaded slide clips; 0.65 N.A. condenser; 5-aperture disc diaphragm; LED illumination; monocular viewing head; durable all-metal construction.
Includes specimens in the following areas: rock-forming minerals; ore-forming minerals; industrial minerals; and igneous, sedimentary, and metamorphic rocks. 40 specimens, 2" x 1 1/2". Comes in a compartmented container.
Includes specimens in the following areas: rock-forming minerals; ore-forming minerals; industrial minerals; and igneous, sedimentary, and metamorphic rocks. 40 specimens, 2" x 1 1/2". Comes in a compartmented container.
Washington Student Collection Designed to accompany the Washington School Collection. 40 unlabeled chips in a zip-lock storage bag.
Washington Student Collection Designed to accompany the Washington School Collection. 40 unlabeled chips in a zip-lock storage bag.
Made from clear glass sheet, (1.8 to 2.0 mm thick) fine ground and polished edges. Packed in boxes of 12.
These 125mm Watch Glasses are made from clear flint glass (1.8 to 2.0mm thick), and have fine ground and polished edges. Packed in boxes of 12.
Made from clear glass sheet, (1.8 to 2.0 mm thick) fine ground and polished edges. Packed in boxes of 12.
These 75mm Watch Glasses are made from clear flint glass (1.8 to 2.0mm thick), and have fine ground and polished edges. Packed in boxes of 12.
Water is vital to all life on Earth and covers nearly three-fourths of our planet's surface. Where does it come from? Will we use it up eventually? In The Water Cycle, students learn that Earth has the same water supply today as it did millions of years ago. Examine the amazing process by which water is continually recycled and transported from place to place through evaporation, condensation and precipitation. Also find out how energy from the sun drives the water cycle and how the atmosphere prevents water from slipping away from Earth. A fun, hands-on investigation demonstrates how an artesian well works, while a visit to a desalination plant showcases how salt water is purified. Part of the Earth Science in Action DVD Series. A Teacher's Guide is included and available online. 23 minutes. Grades 5 to 8.
Ideal field test kit for performing 4 important experiments on water pollution. Test water samples for dissolved oxygen content, chlorides, phosphates, and water hardness. This kit provides all the apparatus and materials necessary for performing each test several times. Comes complete with instruction booklet.
Set includes two helical springs and a length of cotton string. The long narrow spring measures 3/4" x 72", and can be extended to 5 meters. Larger spring measures 3" x 4". Can be extended many times its length without distortion. Includes activity guide. Shipping weight: 2.5 lbs.
Set includes two helical springs and a length of cotton string. The long narrow spring measures 3/4" x 72", and can be extended to 5 meters. Larger spring measures 3" x 4". Can be extended many times its length without distortion. Includes activity guide. Shipping weight: 2.5 lbs.
Spring measures 3" x 4". Can be extended many times its length without distortion.
Spring measures 3" x 4". Can be extended many times its length without distortion.
For demonstrating longitudinal and transverse wave motion. Consists of a number of eccentric aluminum discs supporting a series of metal rods, joined to a handle. On revolving the handle, simulation of waves can be obtained on the rods running in a metal guide. Mounted on a nicely polished wooden case.
Weather affects everyone, everyday! Introduce Isobars, Jet Streams, Wind Chills and more with this super-sized 44" W x 20" H weather map of the U.S. and Canada. Chart temperatures and cities using bar and line graphs. Write-on/ wipe off board with grommets for easy display, conveniently folds flat. Teacher's guide with weather terms, activities, vinyl cling weather symbols and student recording charts included. Grades 3-8.
The rocks and soil that make up Earth's surface are constantly being affected by a variety of forces, ranging from heat and frost to water and wind. In Weathering and Erosion, students will discover the natural forces that cause weathering, erosion and deposition, and see the many effects that these processes have on Earth's surface. Students will examine natural structures around the world and see how weathering and erosion have affected them, while discovering ways in which people have become better prepared to battle these forces through conservation. In addition, a fun, hands-on experiment demonstrates how running water erodes different types of soil. Part of the Earth Science in Action DVD Series. A Teacher's Guide is included and available online. 23 minutes. Grades 5 to 8.
• Made with 0.35mm thick PVC and polyester fabric
• Detachable hood with drawstring
• Storm flap front with snap closure
• 2 flapped front pockets with snap closures to secure valuables
• Cape vented back
• Corduroy collar for comfort
• Available in 4 Sizes
• Available with or without CROSSING GUARD Emblem on Back
This bright yellow rain jacket is made of tough .35mm PVC and polyester fabric. Corduroy lined collar for comfort. Coat has cape-vented back . Includes detachable hood.
| Chest | Length | Sleeve | |
| Medium | 56 in. | 30.5 in. | 32 in. |
| Large | 58 in | 31.5 in. | 33 in. |
| X-Large | 60 in. | 32 in. | 34 in. |
| 2X-Large | 62 in. | 33 in. | 35 in. |
In this step-by-step classroom project students examine and identify individual rock specimens. As each rock specimen is examined and identified, students progress toward the completion of their own rock reference charts. The Teacher's reference chart uses illustrations and actual specimens for students to consult as they identify unlabeled rock specimens. For grades 6-12.
This chart has illustrations and actual specimens for students to consult as they identify unlabeled rock specimens. For grades 6-12. 23 1/2" x 15 1/5".
For use with 12046 What Rock Is It? classroom project.
A highly detailed eye model to satisfy beginning students. Dissectible into 7 parts that include: top section, vitreous body, bottom section, lens (2 parts), iris, cornea. Mounted on a stand. Includes keycard with 41 structures labeled. Enlarged 6 times. Size 5 1/2" x 6 1/4"
• ANSI Class 2 T-shirt.
• 2” Silver reflective tape.
• 100% ANSI Wicking Birdseye.
• 3.8 oz. fabric weight.
• Lightweight fabric provides comfort.
• Pocket: 1 left chest.
Elevate your workwear with our premium ANSI Class 2 T-shirts, designed to keep you safe and comfortable all day long. Featuring 2” silver reflective tape, these shirts ensure enhanced visibility even in low-light conditions. Crafted from 100% ANSI Wicking Birdseye fabric, they keep you cool and dry, providing superior comfort throughout your workday.