Dear sir or madam, Glad to contact you on Internet , we are a Chinese manufacturer of spectacle lens, our products including: CR39 1.499/1.56/1.61/1.67/1.523 mineral lens/1.70 hi-index lens/round top bifocal lens/flat top bifocal lens/progressive lens etc. Our products are good quality with very competitive prices. If you are interested in our products, please kindly contact me. Danyang Chengchuang Optical Co., Ltd / TEL:+86-511-6985101 +86-511-6983582 FAX:+86-511-6983580 Email: jasonsuxing2003(a) .cn Sincerely yours Jason Su