[Class : 19] Prefabricated Non Metal Building Components, Namely, Non Metallic Drainage Gutters, Water Inflow Boxes, Water Inflow Tanks Of Plastic Or Concrete, 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, Prefabricated Components For The Construction Of Building Ventilation And Venting Installations, Ventilation And Venting Grating, Sections For Doors And Windows, Namely Grating, Grilles, 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; Non Metal Roofing For Buildings, 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,