Optical Lens Set, 2", 6-Piece, Convex and Concave Material_Polypropylene 5-inch diameter

5-inch diameter

Beaker-themed beer pong set includes 12 polypropylene 500mL beakers and 2 pong balls for chemistry-themed party gameplay

illustrating molecular symmetry and bonding geometry

Half-size digestive system model fits smaller class benches while preserving the full esophagus-to-rectum path and accessory organ anatomy in two removable parts

and wood for multi-material pendulum

Optical Lens Set, 2", 6-Piece, Convex and Concave Material_Polypropylene 5-inch diameterSix lens optics set of three double convex and three double concave glass lenses with ground beveled edges, designed for image formation and focal length investigation.