19 Prefabricated non-metal building components, namely, non-metallic drainage gutters, water inflow boxes, water inflow tanks of plastic or concrete, surge tanks of plastic or concrete, gullies, down pipes made of plastic, sludge pipes, prefabricated inspection shafts, floor drains with and without stench trap, floor covers, grating, grid plate covers, cover plates, manhole covers with and without perforations, catch pans, wall and window lead-ins for pipes and drainage plates, all used for the construction of facilities, for collecting and supplying water, surface water, sewage and other fluids, and for line drainage or surface drainage; fabricated plastic forms for drainage on buildings, namely, gutters and down pipes, prefabricated components for the construction of building ventilation and venting installations, namely, supply air and venting channels, ventilation and venting grating, outer and inner ducts, frames, angle frames, grating and floor trays for shoe scrapers, fabricated doors of wood, prefabricated windows, window soffits and soffits for basement windows with and without integrated roller shutters, skylights, sections for doors and windows, namely, built-in frames, soffits, protective grating, grilles, architraves and sashes, cellar light wells with and without light well grating, drainage connections for cellar light wells, building glass panels for doors, windows, skylights and light panels for buildings, namely, single glass, insulating glass and double glazed panes; door and window panes made of plastic [ orplexiglass] * or acrylic glass *, skylights, light panels, trapezoid and corrugated panels, non-metal roofing for buildings; prefabricated slatted floor panels, water pipes, drainage pipes, ventilation and venting pipes and supply and sewage pipes, namely, non-flexible pipes, telescope pipes, angular pipes, T-pipe sections, elbow pipes, branch pipes, cleaning pipes, seepage water drain pipes, drainage pipes for building purposes; prefabricated components for the construction of controlling, washing and collecting shafts in drainage installations, and parts and fittings for all aforesaid goods, with all the aforesaid goods comprised wholly or partially of mineral building materials,cement concrete, plastic cement, plastic, rubber and rubber substitutes, earthenware, porcelain, glass, and mineral cast, used in drainage installations in civil and underground engineering, hydraulic construction, road construction, sports field construction and building construction