... 1020*1020mm 1020*2000mm 3.Dielectric properties FR4 Laminate Sheet is a glass fabric reinforcement in an epoxy ... Stiffener, PCB drilling pads,fiberglass meson,potentiometer,carbon film,printed glass fiber,precision planetary gear (chip grind),precision ... electronic switches,insulation board and so on; Technical Data Sheet: ItemUnitValueFR4 sheetDensityg/cm31.7-1.9Flexural strength perpendicular to ...