Rectangular Refraction Acrylic Block, 75 x 50 x 18mm Health & Genetics_Equipment & Supplies and stacking pins for durable

and stacking pins for durable repeated use in dynamics experiments

Heavy-duty 500-piece teacher molecular model set with 230 atoms and 270 bonds

restoring UV-C output in the compatible goggle sanitizer cabinet once the original lamp reaches end of service life

the protective coating shielding glassware surfaces from nicks

Designed to make multimeter operation visible to students

Rectangular Refraction Acrylic Block, 75 x 50 x 18mm Health & Genetics_Equipment & Supplies and stacking pins for durablePairs 75 by 50mm with 18mm thickness on an acrylic rectangular refraction block, the lightweight beveled body giving safer per desk Snell's law and lateral displacement demos.