1) stainless steel ball by deep drawing, 2) 304 material with mirror polished outside, 3) Provide ... plating, yellow passivation, gold passivation, galvanizing, satin, etc.Processing MethodDeep drawing , stamping , punching, bending, CNC spinning, CNC machining, milling, ... lead time ( 7-30days according to order qty ) PackageSuitable for sea and air transportation or as required like foam, carton ...