6 Strips, surface-coated strips, hot-tin-plated strips, profiled strips, stepped strips and sheets, all of common metals and their alloys, in particular curable alloys, iron alloys, steel, copper alloys, copper and zinc alloys, brass, special brass, copper and tin alloys, bronzes, copper, tin and zinc alloys, copper, nickel and tin alloys, copper, nickel and zinc alloys, copper, nickel, zinc and lead alloys, copper, nickel and silicon alloys, nickel silver, leaded nickel silver, copper and iron alloys, light metals and their alloys, aluminium alloys, copper, zinc and aluminium alloys