(1) Standard: ASTM A193. (2) Grade: B7/B7M, B16, B8/B8M, 7M. (3) Size: M6-M100, 1/4"-4", length to 12 feet (4) Material: Alloy Steel. (5) Surface: black, plain, zinc, zinc yellow, PTFE, HDG,etc. (6) Packing: 1 less than 25kgs bulk into carton, then packed on pallet 2 Small box or color box, then into carton, then packed on pallet 3 As customers' request.