"Based on domestic market and expand abroad business" is our progress strategy for Gap Crystal, Lbo Crystal, Near Infrared Crystal, Cerium Doped Yag,Silica Window. Items won certifications with the regional and international primary authorities. For far more detailed information, please contact us! The product will supply to all over the world, such as Europe, America, Australia,Guinea, Bulgaria,French, Johor.In order to meet the increasing requirement of customers both home and aboard, we will keep carrying forward the enterprise spirit of "Quality, Creativity, Efficiency and Credit" and strive to top the current trend and lead fashion. We warmly welcome you to visit our company and make cooperation.