SHINING JINS since 1975 currently supplies cold forgings one piece T-Yoke / Pole piece and U-Yoke / Pot Yoke to numerous Loud-Speaker raw unit driver assembly markets. Our production capacity: Out-Diameter of piece form 28mm to 150mm. Out-Diameter of pole form 12mm to 70mm. Thinkness of piece form 2mm to 30mm. Heigh of pole form 7mm to 80mm. All products conforms to the RoHS international environmental protection standard. You are welcome to visitour web site for the details. Your any inquiry would take our full attention.