... price & prompt delivery 3.used for optical instruments 4.best service Optical glass raw materialsLB series: LB1,LB2, ... LB13,LB14,LB15,LB16,LB7,LB18,LB19 1. available for OEM Orders2. high capacity production3. over 10 years ... time.The materials can make all the coloured glass filters,we can do the OEM orders,just ... free to contact us. LB series optical glass raw material for sale, glass manufacturing raw ...