1.Material: Bk7, Quartz, Caf2, Sapphire. 2.Diameter: .OD:2mm-120mm 3.Edge ... as follows: plano-concave lens,plano-convex lens,bi-concave lens,bi-convex lens,mensicus lens,achro,achromat lens,ball lens,cylindrical lens,spherical lens,aspheric lens etc. Specifications:Material: Bk7, Quartz, Caf2, Sapphire. etc ...