Place of Origin Shandong, China Type Two-piece Brand Name WDO Model Number 1.591 Lenses Material Polycarbonate Vision Effect Progressive Coating HMC Lenses Color Blue Index 1.591 Design Free form progressive Function Photochromic Grey ABBE Value 31 Coating Color Blue Transmission 98-99% Abrasion Resistance 8H Diameter 70mm/65mm