... UL, RoHS, ISO9001 compliant Crown Spring Jack, Made of Brass and CuZn36Pb3 Materials,Available in Various Mating Pin DiametersMaterial quality: ... 390 Plating: G/F, by customers' request Materials: brass and CuZn36Pb3 Available in various sizes Plating: tin-plated 2µm ... in various mating pin diameters Crown Spring Jack, Made of Brass and CuZn36Pb3 Materials, Available in Various Mating Pin Diameters