... Number: 6.35mmApplication: cement,mine,power station,chemical...Material: Carbon Steel, AISI1010Certification: ISO9001:2008hardness: 58-65HRC Packaging & Delivery Packaging Detail:balls are ... is running and reaching to a top level manufacturer of steel ball with Product Creation and Advanced Technology, to fulfill ... an order and sincerely co-operate! 1/4" carbon steel ball for bearings (ISO9001:2008)