Circular, square 25%LS copper clad steel wire (Code: 25LS-CP line) with low carbon steel core wire, completely softening treatment to the quality of mild steel wire, after copper plating layer, plating and with a thick layer of pure tin and. With conductive rate of 25%, the welding wire. Guide needle: LED guide pin, pin, biting flower pin, cross pin, industry and trade prefix pin, T-shaped pin, U shaped needle, jumper, terminal, round guide