orthotics prosthetics spring lock: material:SS304,17-4PH OEM,CNC machining,assemble,service are ... .4308,1.4408,1.4404,SCS13,SCS14,CD4,5AA etc CS:C20, C40, C45, WCB, WCC , 4340 etc AS: 15Cr3, 15CrNi6 ... , 42CrMo4, 35CrMo, 40Cr etcsizeAccording to customers' requirementdesignpacking orthotics prosthetics spring lock