1. Made from optical glass, the prism part can be removed for single use.2. cuttings offer good reflections and light separation.3. Come with a stand, convenient to change prism angle.4. Can be used for teaching physics light spectrum.5. Used in science experiments involving light spectrum.Spec:Description:Triangular prism with a base is very convenient to change prismangle. It can be used in science class of kindergarten, primary school, highschool, as a demonstration equipment, to study the dispersion of light. It alsocan be used as toy to develop intelligence of children. Features:1. Made from optical glass, the prism part can be removedfor single use.2. cuttings offer good reflections and light separation.3. Come with a stand, convenient to change prism angle.4. Can be used for teaching physics light spectrum.5. Used in science experiments involving light spectrum. Specifications:Material: plastic stand, optical glass prismStand Color: blackSize (L*W): 17*12cm/6.69*4.72inWeight: Approx. 109g Package Includes:1 x Optical Triangular Prism1 x Black Stand Instruction:Put prism under sunlight.Rotating prism till light appear seven colors on a wall or white paper. Note:Please allow small deviation due to manual measurement. Thanks foryour understanding.