... Description 1. Raw material: Borosilicate glass, Pyrex, Borofloat, Optical glass, Crystal glass2. Processing: by Molding, Grinding, Polishing3. Surface quality: optical surface ... , Sight lens, Front lens, Refractor, Molded lens, Spot lens, Lamp cover, Lamp shade, Lighting shade, Lighting cover, glass cover, glass shade, glass ...