Check the listing for details. 2.8x4 Inch Double Sided Copper Clad Laminate PCB, 6 Pcs 1mm Prototype Board. Condition: New. Listed at 19.81 USD. Copper Clad Laminate PCB is used as insulating structural parts in motors and electrical equipment, including various types of switch FPC reinforcement, electrical insulation carbon film printed circuit boards, computer drilling pads, jigs, etc. (PCB test racks), and can be used in humid environments and transformer oil.SpecificationSize: 70x100x1mm/2.8x4x0.04 inch;Color: Copper;Material:FR4, Copper;Packing List: 6 Pcs Double Sided Copper Clad Laminate PCBAdvantageCopper Clad Laminate PCB is made of FR4, which has high mechanical and dielectric properties, good heat and moisture resistance, and good machinability.InstructionThe mechanical properties, dimensional stability, impact resistance and moisture resistance of FR4 PCB substrate are higher than those of paper substrate.