I am looking for a supplier of clutch discs that have contact pads made of sintered steel 5191. But I am looking for a Chinese supplier, due to the high value of local and American suppliers. The dimensions of the disks would be 7.25 inches, structural sheet 2.5mm thick. In addition to the discs also need the diaphragm springs, with dimensions as follows: Outside Diameter: 167 ~ 171mm Diameter inner hole: 37 ~ 40mm Thickness: 2.5 to 2.7mm Degree of taper: 10 ~ 14 degrees diametrical position of the screws: 119 ~ 123mm I hope with all reverence to your answer and we can do good business agreements between companies.