All contained in a compact, transparent plastic case. Suitable for car, marine, generators, machinery and installations. Great for plugs of sump, water, fuel and hydraulic fittings. Fine quality copper material, melting point up to 1083. Good electrical and thermal conductivities. Material: copper Box size: approx. 130 * 68 * 22mm / 5.1 * 2.7 * 0.9in Types of size: 9 (M5-M14) Size: (I / D x O / D x Depth)< /p> M591 30pcs M6101 30pcs M6121 20pcs M8121 20pcs M8141 20pcs M10141 20pcs M12161 20pcs M12*18 * 1.5 20pcs M14 * 18 * 1 20pcs Package size: 135 * 70 * 25mm / 5.3 * 2.8 * 1.0in Package weight: package: 175g!