Common metals and their alloys; metal building materials, namely metal canopies and metal reinforcement materials for building; transportable buildings of metal; metallic materials for railway tracks; non-electric cables and wires of common metal; small items of metal hardware, namely, metal brackets, mounts of metal and clamps of metal; pipes, tubes and hoses, and fittings therefor, including valves, of metal, namely, pipes of metal, branching pipes of metal, tubes of metal, spark gap tubes, clips of metal for tubes, metal pipe fittings, ring-shaped fittings of metal, fittings of metal for flexible pipes, fittings of metal for rigid pipes, pipe clamps, nutssealing caps of metal, skelps, pipe muffs of metal, pipe tubes of metal, pipe couplings of metal, industrial metal hoses, metal hose fittings, hose hangers of metal, metal hose clamps, metal elbows for pipes, metal valves not being parts of machines; metal pipes and tubes; ducts and ducting installations of metal, namely ventilating ducts of metal; ducts of metal for air-conditioning and ventilating installations, ducts made of metal for trunking pipes for liquids and gases; metal flanges, flanged pipes of metal; metal adaptors for pipes, namely, flanged adapters, tubular rivet adapters, hose adapters, ventilation adapters, machine adapters, metal adapters and metal head adapters for use with hydraulic and pneumatic systems; bend pipes, namely steel bends, and branching pipes of metal; branch outlet fittings of metal, namely duct branches; manifolds of metal for pipelines, clips of metal for cables and pipes, collars of metal for fastening pipes, connectors and joints of metal for pipes, couplings joints made of metal for pipes, junctions of metal for pipes, elbows and fittings of metal for pipes, metal valves for water pipes, steel and stainless steel pipes; nuts, bolts and fasteners of metal; clack valves and check valves of metal, draw-off valves, metal valves, regulators valves and regulating valves of metal, all other than parts of machines; metallic stopping components for protection against explosions, namely metal explosion protection valves, shut-off valves for explosion protection, and explosion-proof valves, all being other than parts of machines; fire-protection valves of metal; safes; wrought common metals, unwrought or semi-worked common metals; fasteners, namely metal bars and chains, metal threaded fasteners and mechanical fastening elements of metal, wire mesh, iron slabs and wire of common metal, and non-electric metallic wires; metal ores

Spark guards for preventing electrical spark discharge

Gaskets and gasket material, namely pipe gaskets, rubber gaskets, sealing gaskets, flange gaskets and duct end gaskets, pipe gaskets in the form of rings and O-rings; junctions, not of metal, for rigid pipes; junctions, not of metal, for flexible pipes; fittings, not of metal, for flexible pipes; fittings, not of metal, for rigid pipes, non-metallic pipe couplings and joints, non-metal pipe muffs, pipe jackets, not of metal, non-metal elbows for pipes; non-metallic flexible pipes, rubber tubes and pipes, and flexible hose pipes, flexible tubes of plastic, non-metal flexible tubing, non-metallic hoses, flexible hoses, not of metal, non-metal hose fittings, non-metal fittings for pipes; valves of rubber or vulcanized fiber, not including machine elements