Pre-cleaned glass, premium quality, 1mm thick, 3" x 1" colored frosted end slides. Packaged in boxes of 72 slides.
Made from plate glass about 1/16" thick. Highly Silvered back.
This 4in x 4in mirror is made from plate glass about 1/16in thick with a highly silvered back.
• Polycarbonate
• Widely Accepted style
• Frameless safety glasses
• Rubber temple tips
• Traffic signal recognition lenses with anti-fog coating
• Meets ANSI Z87. 1+
Perfect for crossing guards, these protective glasses with brown traffic signal recognition lenses are lightweight. 8.5 base curve polycarbonate dual lens offers 99% UV protection, and have a scratch resistant coating. Integrated rubber temples for firm hold. Lanyard included with every pair. Fits all face sizes. Meets the requirements of ANSI Z87.1 Impact.
Sodium chloride, lab grade, crystal - 500g
Plastic Base w/ Bumper Guards. Graduation Interval: 1ml
Pith balls react sensitively to static charges like those from a charged friction rod or a Van de Graaff generator.
Great for creating terrariums, small aquariums, or as a "critter" cage. Solves the cracking and breakage problem of rigid plastic and glass tanks. Unique features include nestable to save storage space, flexible, shatterproof material, molded foot pegs that prevent scratching and temperature transfer, rounded corners for easy clean up, and no-drip cover. Exclusive design forces condensation to remain in the tank.
Unmounted, high-quality silvered glass. Focal length 150 mm.
These popular lightweight protective glasses have 8.5 base curve polycarbonate dual lens, and offer 99% UV protection. Lenses are treated with a scratch resistant coating. Integrated rubber temples for firm hold. Fits all face sizes. Lanyard included with every pair. Meets the requirements of ANSI Z87.1 Impact.
• 1" wide reflective stripes
• Hook & loop front closure
• Elastic side closures for universal sizing
• One size fits most
• Does NOT Meet the requirements of ANSI/ISEA107
Lightweight, highly visible orange polyester mesh. hook and loop front closure. Elastic side straps. 1" reflective silver stripes on front and back. Does NOT Meet the requirements of ANSI/ISEA 107. One size fits most.
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.
A natural rock that contains traces of iron ore with natural magnetic properties. Measures approximately 2" long.
See what objects this safe and durable Magnet Wand attracts around your house or classroom...or try it with with Magnet Marbles or Metal-Rimmed Counting Chips by Dowling Magnets (not included). Great for magnet play, experiments, sensory tables, scavenger hunts, bingo, party favors, and even your hobbies (cleans up hardware and metal shavings around the workshop or sewing pins and needles). Comes in assorted colors.
Red and blue plastic covered bar magnets. These magnets are attractive as well as an easy way to teach magnetic attraction and repulsion. Each magnets dimensions are 80x15x10mm. 1 pair (2 red / 2 blue).
1" horseshoe magnet with keeper. Lifts two pounds.
3 inch strong zink-plated steel horseshoe magnet with North and South poles marked. Supplied with keeper.
Index of refraction plate, made from acrylic. Polished surfaces.
This acrylic 115 x 65 x 20mm rectangular block is designed for use as an index of refraction plate, and has a polished surface.
Securely hold a mirror in a vertical position on any flat surface. Packages of 6.
Securely hold a mirror in a vertical position on any flat surface. Packages of 6.
Unmounted, high-quality silvered glass. Focal length 150 mm.
Unmounted, high-quality silvered glass. Focal length 150 mm.
Rugged plastic pulley with deep V groves mounted on a metal clamp. The sheave is 50mm in diameter. Clamp can be mounted on surfaces up to 25mm thick.
Rugged plastic pulley with deep V groves mounted on a metal clamp. The sheave is 50mm in diameter. Clamp can be mounted on surfaces up to 25mm thick.
Pulley is high-quality impact-resistant, chip-proof injection molded, balanced wheel. Smooth, clean V-groove. Wheel diameter 2", 360 degrees swivel hooks-top and bottom. All steel blocks.
Pulley is high-quality impact-resistant, chip-proof injection molded, balanced wheel. Smooth, clean V-groove. Wheel diameter 2", 360 degrees swivel hooks-top and bottom. All steel blocks.
General purpose use and also for use with inclined plane. Metal pan with cords for suspension.
Hard rubber, ebonite friction rod with rounded edges about 11 Inch (280mm) x 0.47 Inch (12mm) Length x Diameter. Measurements are approximate.
Hard rubber, ebonite friction rod with rounded edges about 11 Inch (280mm) x 0.47 Inch (12mm) Length x Diameter. Measurements are approximate.