Protection Function - The flat washers can distribute a load and prevent damage to the surface to be fixed. And isolate the screws from the surface. Extended machine life. Easy to Find - Package contains 200PCS flat washers and lock washer in a clear PP box. You can clearly see the copper sump plug washer through the plastic compartmented housing. Feature - Made of copper. Good electrical conductivity and thermal conductivity. Melting point up to 1083. Wide applications - Perfect for most types of engines, whether cars, boats, generators, machinery and installations. Also great for sump plugs, water, fuel and hydraulic fittings. 9 Sizes - Contains 9 sizes of the most commonly used washers. Features: Top quality copper material, melting point up to 1083 degree centigrade. Good electrical conductivity and thermal conductivity. 200pcs solid copper sump plug washer set. All contained in a compact and see through compartmented plastic case. Great for sump plugs, water, fuel and hydraulic fittings. A sump plug washer set to suit all types of engines be it Car, Marine, Generators, Machinery and Plant. Description: < p>Brand new Material: copper Color: as picture shows Box size: approx. 130x68x22mm Size types: 9 (M5-M14) Quantity: 200pcs Size: (I/D x O/D x Depth) M5*9*1 30pcs M6*10*1 30pcs M6*12*1 20pcs M8*12*1 20pcs M8*14*1 20pcs M10*14*1 20pcs M12*16* 1 20pcs M12*18*1.5 20pcs M14*18*1 20pcs Note: -Please allow 1-5mm errors due to manual measurement. -Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.