Material: 45# steel,40 Cr, SUS and other material Quality grade: 8.8,10.9,12.9 surface: according to customer's requirements Material: 45# steel,40 Cr, SUS and other materialQuality grade: 8.8,10.9,12.9surface: according to customer's requirements we can supply these products according to customer's drawing or sample. competitive price, samll order can accept.