... quality with competitive price 3.ISO,UL,RoHs,SGS Electronic Switch PCB Board 1.We have over 10 years experience in PCB ... )19Surface FinishedHAL, ENIG, ImAg, Imsn OSP, Plating AG, Plating gold20MaterialsFR4,H-TG,Teflon,Rogers,Ceramics,Aluminium, Copper base Electronic Switch PCB Board