Whether you call them triangular prisms or equilateral prisms, our Amlong Crystal Prisms are the perfectly clear solution to your photography or teaching needs. Dimensions: Length: 6 inch / 150mm; Side Length: 1.38 inch / 35mm. Our prisms are wider than most competitor's prisms making them easier to hold and use. Use our prism for photography. Hold it in front of the camera to create unique prism effects similar to a kaleidoscope. Or use its light refraction capabilities to to create light leaks, image refraction, and rainbow reflections. It is invaluable as a teaching tool to demonstrate light waves.