... steel flat washer *Material:carbon steel,steel *Size:as required *Finished:natural,zinc/nickel plated *ISO9001:2008 Carbon steel flat washer* Material:brass,copper,stainless steel,carbon steel ... according to customers' design,eg:nuts,rivets,screws,bolts,standoffs and so on,if you have similar demands please feel free ... me.We kindly hope to have the opportunity to work and serve for you.