... . lamp cover1.Raw material:Borosilicate glass,pyrex.2.Processing:by molding3.Glass propery:Risistence to high temperature shock4 ... .Inside quality:clear and transparent5Function of glass lens:guide of light direction.6.Application:Lighting ... sight lens,front lens,refractor,molder lens,spot lens,light shade,light cover,glass sheet,glass cover,glass shade. lamp cover borosilicate glass ...