Metal Green Inspection Ball Cover Two-piece construction Made from aluminum. Protects tooling and inspection balls from damag Metal Green Inspection Ball Cover One piece fixs directly on jig fixture with two screws,two piece joint with screw thread Protects tooling and inspection balls from damage between operations. Tooling Ball Cover have strictly production process from material to production to package. First, we choose high-quality material. They have passed international certification from NSK, FAG, SKF and any other bearings manufacturers. Second, we will record all data in the whole production process. We can confirm and slove any problem at the first time by our Lot No. Third, our strong inspection office for high precision tooling and checking balls . Standard balls all import from Japan. Fourth, strong production capacity about 160 ton steel balls for each month. Delivey Terms : DHL;TNT; UPS ;FEDEX ect.