... high quality,competitive price & prompt delivery 3.used for optical instruments 4.best service Optical glass raw ... LB13,LB14,LB15,LB16,LB7,LB18,LB19 1. available for OEM Orders2. high capacity production3. over 10 years ... .The materials can make all the coloured glass filters,we can do the OEM orders,just need ... us. LB series optical glass raw material for sale, glass manufacturing raw material.