[Class : 19] Concrete; Ready To Use Concrete; Cement; Portland Blast Furnace Slag Cement; Gravel; Sand; Materials, Not Of Metal, For Building And Construction; Concrete Blocks; Soil Bricks; Semi Refractory Bricks, Not Of Metal; Luminous Paving Blocks; Paving Stones; Mortar; Fire Protection Construction Materials, Not Of Metal, In The Form Of Sleeves And Collars For Use In Apertures In Walls; Gypsum Wallboards; Aggregates For Use In The Preparation Of Concrete; Building Stone; Granite; Marble; Limestone; Ceramic Tiles; Ceramic Roofing Tiles; Plaster For Use In Building; Asphalt; Construction Materials, Not Of Metal, Being Fire Resistant Bituminous Coatings For Roofing; Building Glass; Construction Timber; Plywood; Veneers; Laminates Of Non Metallic Materials For Use In Construction; Non Metallic Rigid Pipes For Building; Non Metallic Pre Fabricated Walls.