... is of my company's process capacity for your reference, for more messages, pls contact with us freely!ItemSpecification MaterialFR-4 / Hi ... Thickness0.7mil,raised H≤0.05Colour green,blue,red,yellow,black,white(LPI/MATT.,UL 94 V0 approved) Surface Finish HALtin ... pass for the first time,+/-2%(tolerance) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! loudspeake and radiator PCB with UL standard ...