Low-Friction Double-Tandem Plastic Pulley, 38 and 50mm Diameter Subcategory_Force and Motion Nickel-plated T-pins provide secure specimen

Nickel-plated T-pins provide secure specimen pinning with broad heads for stable dissection board mounting in biology laboratories

adjustable from 0 to 45 degrees with an alignable pulley and included pan and roller

75 inches tall with visible crankshaft

3 glass Griffin-form beaker shot glasses hold 3

Optically-worked glass double convex lens with a 150mm focal length and 1

Low-Friction Double-Tandem Plastic Pulley, 38 and 50mm Diameter Subcategory_Force and Motion Nickel-plated T-pins provide secure specimenTandem double plastic pulley pairing 38mm and 50mm low friction wheels on an open sided steel frame, eliminating cord threading during setup in compound pulley experiments.