Material: K9 Optical Glass r nSize: 30*30*30*150mm nColor: Clear r nBrand new and high quality. r nType: Optical Glass r nFeature: r nFunction: Use this equilateral prism to split a beam of light into its component colors (the colors of the rainbow). r nSide length: 1.18 inches / 30 mm. They are easy to hold and use. r nWide applications: Show your children a rainbow, or use our prism for photography to create unique pictures. r nMaterial: Lead-free K9 optical glass. r nWorry-free customer service: We have a professional team and thoughtful customer service. If you have any questions, please contact us, and we will get back to you as soon as possible. r n r nPackage includes: 1 pc optical glass (with gift box) r n r nNote: r nDue to the light and screen setting difference, the item's color may be slightly different from the pictures. r nPlease allow a slight dimension difference due to different manual measurements.