We are a professional eyewear manufacturer in China, we are located in Chinese Eyewear Hometown----Danyang city Jingsu Province, about 3.5 hours driving away from Shanghai City. We are strong in producing all kinds of optical frames, sunglasses, reading glasses. Our products are made of high quality materials to include: Pure Titanium, Memory Titanium, Stainless Steel, Acetate, and Monel. Our products are in conformity with FDA standard of USA and CE standard of Europe. Our philosophy focuses on high quality, competitive prices, and timely delivery. We also supply optical lenses and optical cases and accessories. Our lenses specification as below Material: CR-39 Resin Refractive Index: N= 1.499 / 1.56 / 1.61 Surface Treatment: Uncoated / Hard Coated / AR Coated / HMC.EMI / UV400 Types: Single Vision / Flat top Bifocal / Round top Bifocal / Blend Bifocal / Progressive Colours: White Blank, blue / green / purple / golden coating, photochormic If you have interest, please feel free to visit our website and login to browse more. I hope to establish a mutual and long-term business relationship with you in the future. If you have any questions, please let me know. I shall do my possible to service you.