19 Non-metal building materials, namely, press seals; non-metal building materials, namely, press seals in the nature of a sealing closure for wall and floor openings; non-metal building materials, namely, press seals in the nature of a sealing closure for wall and floor openings penetrated by a line; non-metal building materials, namely, cable entries, wall sleeves, [waste water entries,] single building entries, [multiple-service building entries, roof entries,] all of the foregoing being in the nature of non-metal ducts; non-metal rigid pipes for use with foundations; non-metal rigid pipes for building, namely, wall sleeves in the form of pipes, feed tubes, protective tubes, [drain pipes; asphalt; pitch and bitumen; non-metal transportable buildings; non-metal monuments; drain pipes, not of metal; concrete; concrete building elements, namely, prefabricated concrete water wells, prefabricated concrete sump pits in the nature of sump reservoirs, prefabricated concrete storm water cisterns and elements of the foregoing in the nature of prefabricated sections of concrete water wells, concrete sump pits in the nature of sump reservoirs and concrete storm water cisterns; concrete walls, concrete pipes and concrete plates in the nature of reinforcing plates for concrete and wood building construction;] [ non-metal concrete casting forms, namely, boarded panels, shuttering panels, shuttering rails, pre-cast concrete wall forms; non-metal outlet pipes, namely, non-metal drain pipes, non-metal gutter pipes, non-metal drop pipes in the nature of drain pipes; non-metal penstock pipes; kits for constructing prefabricated non-metal houses; non-metal fireproof construction materials, namely, intumescent materials in the nature of pads; sandstone tubes for building, in the nature of sandstone pipes; non-metal manhole covers; non-metal manhole liners; non-metal props in the nature of support stanchions for building construction; non-metal beams; non-metal water-pipes;] building materials primarily of plastics, namely, wall and floor ducts; attachments for non-metal wall and floor ducts, namely, non-metal covers for floor and wall ducts through which lines can be led and blind non-metal covers for wall and floor ducts, namely, closing covers for closing the duct prior to leading through a line, the covers being provided for an insertion into or a connection to the wall and floor ducts