... copper washers: material:copper,bronze,steel,brass etc. size:m5,m6,m8,m10,m12,1/4",1/8" shape:flat or ring ... offer OEM Wide range of applicable working conditions, high temperature and high pressure resistance, applicable to super low temperature. The copper ... using on the flange pipe of high pressure and high temperature.It's easy that the ... picture show), or 100pcs/box. high quality copper washer