Ducts of metal, namely, metal air conditioning ducts, metal heating ducts and ventilating ducts of metal; shielded flexible pipes of metal; connection packings of metal; manually operated metal slide valves and gates of metal; metal joinery fittings and their metal screws, bolts and rivets; fasteners and assembling devices of metal, namely, spacer brackets of metal; tube guides of metal; pipe supports of metal, for instance pipe hangers, protective bushings and sleeves; flanges, rosettes of metal; pipe couplings of metal; fountain mouths, gargoyles and ornamental outlets of metal

Plumbing, heating valves and fittings, for instance valves, thermostatic valves as parts of heating installations and tap water faucets; sanitary installations, namely, pipes being parts of sanitary facilities, ozone sanitizers for air and water, urinals, toilets bowls and sinks; water conducting apparatus, namely, water faucet spouts; conduit installations for central heating; respectively piping systems, especially between heating boilers and floors with risers and return pipes as well as floor distribution systems with supply and return pipes, namely, steam heating apparatus for industrial purposes; filters, especially fine filters for tap water; plumbing valves, namely, check valves; shut-off valves for water heaters for domestic, commercial or industrial use

Packing, stopping and insulating materials, namely, waterproof packings for construction, insulating water proofing membranes and electrical insulating materials; and plastic flexible pipes for conveying natural gas and for plumbing purposes

Protective ducts and tubes made of plastic materials for construction purposes, namely, air conditioning ducts, non-electrical circuitry ducts, heating ducts and ventilating ducts, and building materials, namely, plastic pipe supports