Fangrui Product Details Fangrui Product Details Material: Made Of High-quality K9 Optical Glass, Which Can Effectively Disperse The Spectrum, Create A Beautiful Rainbow, And Create An Elegant Artistic Atmosphere. Size 6inch/150mm. Physics Experiment Classroom: These Highly Transparent Prisms Are Safe And Environmentally Friendly. The Effects Of Light Refraction Can Be Demonstrated To Students Through Optical Lenses. Art Photography: Photographers Can Use This Glass Prism To Create A World Of Light And Shadow, Adding A Mysterious, Romantic Or Atmosphere To Photos. Gift Idea: It Is Very Suitable As A Gift For Artists, Photographers, And Teachers To Use In Outdoor Landscapes, Scientific Experiments, And Social Activities. Colour:transparent Material:glass Package Contents: 4x Triangular Prism Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.