1.Material: Bk7, Quartz, Caf2, Sapphire. 2.Diameter: .OD:2mm-120mm 3.Edge thickness: 1mm +/- ... prism,trangular prism,cylindrical prism etc. Specifications:Material: Bk7, Quartz, Caf2, Sapphire. etc.Diameter: .OD:2mm-120mmEdge thickness: 1mm +/- 0.10mm ...