orthotics prosthetics spring lock: material:SS304,17-4PH OEM,CNC machining,assemble,service are ... ; Precise finishing; Argon arc welding; Sand blasting; Clearing and finishing; Heat treatment; Correction and inspectionMaterialSS:303,304,304L,316,316L,CF8,CF3 ... , 42CrMo4, 35CrMo, 40Cr etcsizeAccording to customers' requirementdesignpacking orthotics prosthetics spring lock