1pcs Optical Glass Triangular Prism With Base Light Spectrum Physics Teaching Tool Description: A triangular prism with a base in which it is very convenient to change the angle prism. It can be used in the classroom of kindergarten, elementary school, high school, as demonstration equipment to study light scattering. It also can be used as toys to develop children's intelligence. Features: 1. Made of high quality optical glass, the prism parts can be removed for single use. 2. Precision cuttings offer good reflection and light separation. 3. Come with a stand, convenient to change the angle prism. 4. Can be used to teach the physics of the light spectrum. 5. Used in the field of learning experiments using the light spectrum. Specifications: Material: Plastic Stand, Optical Glass Prism Stand Color: Black Size(L*W): 17*12cm/6.69*4.72in Weight: Approx. 109g Package Included: 1 x Optical Triangular Prism 1 x Black Stand Instruction: Place the prism under sunlight. Rotating prism until the light appears seven colors on the wall or white paper. Note: Please allow slight deviation due to manual measurement. Thank you for your understanding. 1) we accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow. 2) Payment must be made within 3 days of placing the order. 3) If you can't bring back immediately after the auction ends, please wait for a few minutes and try again, the payment must be completed within 3 days. About Shipping 1.