... +/-0.01mm 3.make as per drawings or samples 4.100% inspection Item NO. welded steel ringsMaterialsIron, aluminum, steel, copper, ... plastic, carbon steel, nylon, bronze, solder alloy, HSS, tool steels, or as ... , spraying, and painting and so on.PackingWooden box, or as per the customer’s requirementsProcessing equipmentsCNC machining center, ...