Check the listing for details. Kanayu 12 Pack Clear Triangular Prism Optical Glass Triangular Prism Triple.... Condition: New. Listed at 29.00 USD. Kanayu 12 Pack Clear Triangular Prism Optical Glass Triangular Prism Triple Prism for Photography Effects Physics Teaching Light Spectrum Optics Prism (2" 3/8 Inch) Quality Craftsmanship and Material: these glass prisms measure approximately 2"3/8 inches, and are carefully crafted from reliable crystal glass, promising durability as well as excellent light refraction properties for numerous uses What You Will Get: every package comes with 12 crystal glass prisms for science, sufficient quantity allows for a comprehensive classroom learning experience or multipurpose use in various settings Exceptional Clarity: boasting a clear, color free finish, this triangular prism is engineered to facilitate maximum light refraction with minimal distortion, providing a crisp illustration of the spectrum or stunning photography effects Versatile Educational Supplies: these crystal prisms serve as great supplies for science experiments and classroom study, ideal for demonstrating the principles of light refraction and dispersion; Their suitable size allows for easy handling, making them great for education purposes Incredible Photography Tool: unleash your creativity with the triangular spectrum prism, adding a dash of refraction and rainbow effects to your photos, thereby creating a distinct, whimsical feel; Despite its seemingly delicate nature, it is tough enough to withstand regular usage