Features: Beautiful and unique design of cubic six sides can be pervious to light, in the same environment, different Angle different color rendering 100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection. Used as a teaching or research tool Beautiful appearance, can be used for decoration Can also be used in photography, which can produce a good filter effect Specification: Material: K9 optical glass Size: 2 x 2 x 2cm / 0.8 x 0.8 x 0.8in, 2.2 x 2.2 x 2.2cm / 0.9 x 0.9 x 0.9in(Optional) Package list: 1 xOptical Glass Prism 1 x Clean Cloth .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Beautiful and unique design of cubic six sides can be pervious to light, in the same environment, different Angle different color rendering 2100% quality optical glass, made of K9 optical glass, with better refraction and clear reflection. 3Used as a teaching or research tool 4Beautiful appearance, can be used for decoration 5Can also be used in photography, which can produce a good filter effect