Features:A beam of light bends as it passes through the glass prism, then the prism disperses the light into various colors in the rainbow.The equilateral prism with three 30mm equal sides.Surfaces and edges are well polished without burrs.Crystal clear prism has better light transmittance and refraction effect.Made of K9 optical glass that has excellent performance.For teaching experiment, optical experiment promoting, rainbow DIY, taking pictures, etc.Specifications:Type: 30x30x100 / 30x30x150 / 30x30x200 (Optional)Side Length: 30mm / 1.18inItem Weight: 100g / 169g / 346gMaterial: K9 optical glassPacking List:1 * Prism Our products are made with the splendid quality materials and are designed to provide you with the best possible user experience.