Optical Lens Set, 2", 6-Piece, Convex and Concave Material_Polypropylene Half-size digestive system model fits

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

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

reading -50 to 300°C at ±1°C accuracy up to 200°C for a range of lab heating

3 glass Griffin-form beaker shot glasses hold 3

and wood for multi-material pendulum

Optical Lens Set, 2", 6-Piece, Convex and Concave Material_Polypropylene Half-size digestive system model fitsSix 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.