Copper Nut and Bolt Assortment Kit with Box Washer 200Pcs Flat Gasket set of sump plug washers suitable for all types of engines: cars, boats, generators, machinery and installations. Features: Premium copper material, melting point up to 1083. Good electrical conductivity and thermal conductivity. All contained in a compact and transparent plastic case. Ideal for sump plugs, water, fuel and hydraulic connections. Specifications: Material: Copper Box Size: Approx. 130 x 68 x 22mm / 5.1 x 2.7 x 0.9in Size types: 9 (M5-M14) Size: (I / D x O / D x Depth) M5 x 9 x 1 30pcs M6 x 10 x 1 30pcs M6 x 12 x 1 20pcs M8 x 12 x 1 20pcs M8 x 14 x 1 20pcs M10 x 14 x 1 20pcs M12 x 16 x 1 20pcs M12 x 18 x 1.5 20pcs M14 x 18 x 1 20pcs Size of packing: 135 x 70 x 25mm/ 5.3 x 2.8 x 1.0in Package weight: 175g / 6.2ounce Package list: 200 x Copper Washers 1 x Caseand 34; Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.