... ,m6,m8,m10,m12,1/4",1/8" shape:flat or ring offer OEM Wide range of applicable working conditions, ... you the softened copper, and it can be bended with hands. Copper content is more than 99.0%, and ... we dealing our washer with annealing and acid cleaning processes, the hardness is no ... .Package:100pcs/plastic bag(as the picture show), or 100pcs/box. high quality copper washer