... 3.Surface:polishing 4.Mould:already have,can make directly U shaped bolt1. Material:iron,steel,stainless steel ,brass,aluminum and ... . Surface treatment:Zinc plated,power coated,chrome plated,hot-dip galvanized or others6. Packing:wooden case,pallet,strong box oraccording to ... in need of metal products. U002-stainless steel nickel plated U bolt