Description: Model: Triangular Prism. Size :8cm*2.5cm*2.5cm. Material :optical glass. Seven-color reflects sunlight and teach children to explore the mysteries of light to stimulate a child's thirst for knowledge, teaching children to understand the magic world. This Triple prism is a brand new and durable one. It is used to research the refraction and dispersion of the light, and make a thorough inquiry of the forming of the rainbow. Buy it now, and let your children enjoy the fun of light! It is a good present for children! Package Include: 1 x Triple Prism. Welcome to burang!For make sure the stock is available ,you can refer to the product detail and tell me what size and what color you want ? Dear you also can following us.The time is about 2 weeks.You can leave the message first ,Our working time is Monday to Friday 9:00am-18:30pm.,we will reply you asap. Feel free to browse around!We do offer bulk pricing based on order quantity.Do message me for any inquiry on the product you're interested in. :)We will show you our best products and services. We will promptly update the product market, and promised 100% of new products.