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