Detailed Product Description 1. Raw material: Borosilicate glass, Pyrex, Optical glass,Float glass2. Processing: by Molding, Grinding, Polishing,Coating3. Surface quality: ... % or 99.50% 6. Function: Guide of the light beams, glass lens or optical lens by spraying used as lamp shade ... lens, Refractor, Molded lens, Spot lens, Lighting shade, Lighting cover,glass sheet,glass lens,Par lens, Par reflector