Description:Flat washers made of copper,have a tighter seal and high heat resistance than steel and rubber washers.High electrical conductivity and thermal conductivity, good sealing effect, nonmagnetic,reliable to use.Flat washers are used to support and spread the load across the baring area of the bolt and nut to prevent pull through.Specialized material provides fine workmanship,smooth surface for perfect results.Sturdy and durable,great for outside applications,easy to install.Widely used in various environments pertaining to hydraulic fittings,water,fuel,and sump plugs.Size: 20x24x1.5mm / 0.79"x0.94"x0.06"(ID*OD*T)Package Include:10 x Copper Washers