Size: length 90mm, height 20mm Color: transparent Material: glass << Application: Use this equilateral prism to split a beam of light into its spectral components (the colors of the ). << Design: Wide and triangular design, makes it easier to hold and use. << Multifunction: Create a effect in your photo using the light refraction technique below. You also can remove an unwanted element in your background using your new prism camera filter to create a unique photo. << Use: Widely used in learning physics experiments, teaching aids. Material: Made from optic glass, not plastic, which has extremely high light transmittance and light-refracting characteristics Notes: 1. Please allowed 1-3mm differences due to manual measurement, thank you for your understanding 2. Due to the difference between different monitors, please understand that the picture may not reflect the actual color of the item.