Diameter.: 4MM--20MM (1/4"---1/2")
Length: 12MM--500MM. (1/2"~20")
Grade: 4.8/5.8/6.8/8.8
Surface: Zinc Plated, BLACK, PLAIN, YZP, HDG
Standard: DIN571
Packing: bulk or small box packed in cartons, then in pallets.