... the customer's requirment.Right, Left, Spur5-8Auto Electric Power Steering (EPS)Note: 1.The worm shft material can be 40Cr ... .or according to the customer's requirements 2. The worm wheel material can be Brass, CuSn12Ni, QAL10-4,QA15, PA46 etc ... . or according to the customer's requirements. worm wheel and gear for auto steering system