Two 38 mm spherical lenses; one is a double concave, the other a double convex, each with a focal length of 150mm. When placed together the net focal length is zero. (1-1/2" x 1-1/2" x 1/4"; .005Ib).
Great for optics experiments in the lab or classroom.
These premium 5mil medical-grade Nitrile Exam Gloves are designed and manufactured for superior comfort and protection.
These ear plugs are made of self adjusting foam that provides a comfortable, low pressure fit and excellent sound filtration.
High-protection, fluid-resistant and anti-static disposable lab coat in size Large.
These disposable face shields are popular with health professionals, dentists, EMTs, etc. They act as a full-face barrier protection against body fluids.
Box of 100 X-SMALL nitrile exam gloves.
These disposable surgical-style earloop face masks conform to the ASTM F1862 Level 1 clasification. Box of 50.
Build a robot that's an artist too!
This black scorpion specimen is great for the classroom setting!
Exciting magnet exploration for ages 8 and up!
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
This adapter-powered butterfly uses Flexinor wires to create a realistic visual effect!
This is a classic demonstration toy of the powers of magnetic fields!
At xUmp.com you will find a large selection of scientific products carefully curated by real scientists and educators. We sell everything from educational toys, teacher supplies for science classroom, lab equipment, science toys, science fair supplies, classroom equipment, chemistry glassware, chemistry lab equipment, physics demos, electronics supplies, robots, science kits to geeky science gifts.