... thickness,OSP,high quality, competitive price,best sales service Aluminum base PCB for ledOver 7 years' experience in manufacturing100% quality tested ... ), Gold plating, Electroless nickel immersion gold,Immersion Tin, OSP(Entek) Base Material:Polyimide(Kapton), Polyester(PET), Aluminium, FR4Copper Foil:ED/RAMin ... both allowed6)Trade terms:EXW OSP 1oz copper weight Aluminum base LED PCB