Features: _x000D_ 99.99% brand and high quality. _x000D_ Made of 65# manganese steel, these lock washers are durable and sturdy. _x000D_ This set contains many different sizes of washers to meet various need. _x000D_ There are total 260 lock washer that you may use for a long time. _x000D_ All washers are well packed and assorted in a plastic box for convenient storage. _x000D_ _x000D_ _x000D_ Specification: _x000D_ Material: 65# manganese steel _x000D_ Surface Finishing: Blackening_x000D_ _x000D_ Size(inner dia.*outer dia.*thickness)& Quantity: _x000D_ 3*9*0.25mm 30pcs _x000D_ 4*12*0.25mm 30pcs _x000D_ 5*12*0.25mm 40pcs _x000D_ 6*16*0.25mm 50pcs _x000D_ 8*17.5*0.25mm 50pcs _x000D_ 10*20*0.25mm 40pcs _x000D_ 12*25*0.25mm 20pcs _x000D_ Weight: 169g / 6oz (approx.) _x000D_ _x000D_ _x000D_ Package list:_x000D_ 1 box * Lock Washers 199.99% brand and high quality. 2Made of 65# manganese steel, these lock washers are durable and sturdy. 3This set contains many different sizes of washers to meet various need. 4There are total 260 lock washer that you may use for a long time. 5All washers are well packed and assorted in a plastic box for convenient storage.