... strictly quality control Outer diameter10mm~90mmType:spring washer.Main material:carbon spring steel, alloy spring steel, refractory, steel, stainless ... and lanterns,bicycles,sports equipment ,etcpacking:A. inner packing:polybag B. outer packing: Several polybag ... Washers: flat washers, spring washers, lock washers, structural Washers. square washer, bowl washer.Screws: machine screws, self tapping ...