... . High abrasion resistance 3. White, photogrey, photobrown(PGX,PBX) 1.523 Glass lens; white, PGX, PBX opticalLens Specifications:1. Material:Glass ... (Mineral lens)2. Index:1.523 for optical frames;3. Diameter available:65/70mm for SV ... . Normal Power Range(SPH/CYL): Diameter 65/70mm: 0.00~±6.00/-0.00~-4.0010. Leading time:20~30days for normal powers ...