Rectangular Refraction Acrylic Block, 75 x 50 x 18mm Health & Genetics_Equipment & Supplies sized for the longer reach

sized for the longer reach when students wire across a bench between power supply

ground polished edges and optically worked surfaces giving long-bench divergence flexibility in refraction work

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

exposing the full urinary tract for combined anatomy and physiology teaching at 15 by 9 inches

Rectangular Refraction Acrylic Block, 75 x 50 x 18mm Health & Genetics_Equipment & Supplies sized for the longer reachPairs 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.