Custom manufacture of building and construction materials and elements of metal; Custom manufacture of pipes, tubes and hoses, and fittings therefor, including valves; Custom manufacture of nuts, bolts and fasteners; Custom manufacture of sanitary installations, water supply and sanitation equipment; Custom manufacture of heating, ventilating, and air conditioning and purification equipment; Custom manufacture of solar collectors for heating; Custom manufacture of radiator caps; Custom manufacture of electric heating cables; Custom manufacture of space heaters; Custom manufacture of flexible pipes, tubes, hoses, and fittings therefor, including valves; Custom manufacture of seals, sealants and fillers; Custom manufacture of thermal insulation articles and materials; Custom manufacture of insulating tapes and bands; Custom manufacture of of building and construction materials and elements, not of metal; Custom manufacture of fasteners; Custom manufacture of valves, non-metallic; Custom manufacture of pipe fasteners, connectors and holders