[Class : 19] Rigid Pipes And Valves Therefor, Non Metallic; Pvc Rigid Pipes For Construction Purposes, Pvc Water Pipes, Pvc Sewer Pipes; Rigid Pipes, Not Of Metal; Gypsum; Building Materials (Non Metallic); Bricks; Acoustic Panels Not Of Metal, Acoustic Panels Of Wood For Ceilings, Acoustic Panels Of Wood For Walls; Alabaster Glass; Plywood; Wood Boards; Cement And Veneers.