SIZE TYPE: Flat washers of different sizes: M5, M6, M8, M10, M12, M14, M16, M18, M20, 12 types of flat washers can meet your different needs. HIGH QUALITY MATERIAL: Made of high quality copper, well sealed, high temperature resistant, rustproof and durable, with good electrical and thermal conductivity. FUNCTION: Flat washers can be used to disperse pressure on fasteners, protect the surface of parts and reduce friction clearance. And insulate the steel screw from the surface.CONVENIENT STORAGE: Place the flat pad in a transparent storage box with compartments and place it according to the specifications for easy carrying and storage.WIDELY USED: Can be used for oil pan plugs, hydraulic accessories, can also be used for preload indicators to lock and reduce vibration. Feature - Premium copper material, melting point up to 1083 degrees Celsius. Good electrical conductivity and thermal conductivity. - A set of sump plug washers for all types of engines, whether cars, boats, generators, machines and installations. Specification Material: copper Color: as picture shows Size types: 12 Quantity: 280pc Size: M5 x 9 x 1 M6 x 10 x 1 M6 x 12 x 1 M8 x 12 x 1 M10 x 14 x 1 M8 x 14 x 1 M12 x 16 x 1 M14 x 18 x 1 M12 x 18 x 1.5 M16 x 20 x 1.5 M16 x 22 x 1.5 M20 x 26 x 1.5 Package contents M5 x 9 x 1 30pcs M6 x 10 x 1 30pcs M6 x 12 x 1 20pcs M8 x 12 x 1 30pcs M10 x 14 x 1 30pcs M8 x 14 x 1 20pcs M12 x 16 x 1 25pcs M14 x 18 x 1 25pcs M12 x 18 x 1.5 20pcs M16 x 20 x 1.5 20pcs M16 x 22 x 1.5 15pcs M20 x 26 x 1.5 15pcs 1 x boxWelcome to meet