37 Building construction; and repair and installation services for metal building materials, namely non-electric cables and wires of common metal, locks of all kinds, pipes and tubes of metal, pipe and hose fittings, door and window handles, door and window roses, door and window plates, door and window pulls, door and window stoppers, door and window protectors, door and window hinges, door and window latches, door and window springs, door and window knobs, door and window buffers, door and window closers, door knockers, letter slots, letter boxes, letter box flaps, doorbells and bell plates, tube holders for use in construction and building, metal brackets for use in construction and building, railings, breastwork, handrails, support grips, hand grips, holding bars, non-luminous reference signs, doors, windows, door frames, window frames and parts therefor, non-metal pipes and tubes for building, and non-metal transportable buildings