8cm Optical Glass Triple Triangular Prism Physics Teaching Light Spectrum

Descriptions:
Triangular prisms are used to disperse light, that is to break light up into its spectral components(the colors of the rainbow)
Specifications: Material: Optical glass, not plastic Color: Transparent Side length: 8 cm / 3.15'' Prism length: 2.5 cm / 0.98'' ? Package Included:? 1 Pcs x Triangular prisms