Product Name: 1.499 Single Vision 80mm Optical Lens Hc Tintable Coating: Hc Tintable Customized: Non-Customized Certification: ISO9001, CE, FDA Lenses Color: Clear Material: Cr39 Shape: Single-lens Transmittance: 90%-95% Type: Convex Lens Usage: Optical Transport Package: Piece/Envelope, Carton Specification: 80MM Origin: Danyang, China HS Code: 90015099 Product Description Description :*CR39 1.499 CR-39 80MM Single Vision Optical Lens HCT.* This is big curve and diameter lens. For sunlens use and tinting.Features :*Material*Character1). Index 1.499 cr-391). High impact-resistance (FDA)2). Raw Material: Plastic2). Stable Quality3). Abbe Value: 523). High Transmission4). Gravity: 1.32g/cm34). No interal stress5). Transmission: 92%5). Specailly for Plus powers