Eisco Labs Equilateral Acrylic Prisms (1"/25mm sides), Set of 3 Prisms - 1" (25mm), 2" (50mm), 4" (100mm) Lengths

Eisco Labs 3 Piece Acrylic Prism Set - Ultra Durable and Lightweight - 1, 2, and 4 Inch Lengths - Designed for Teaching Physics and Refracted Light - Create Spectrums, Create Rainbows for Photography

Amlong Crystal 6 inch Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 150mm

Physics Optical Experiment Set Multifunction Reflector Refraction Triangular Prism Convex Lens Concave Mirror Dial Linear Light Source Teaching Demonstration Equipment for Teacher Student Education