[Class : 19] Building Slabs (Non Metallic), Building Bricks (Non Metallic), Blocks For Building (Non Metallic); Building Beams (Non Metallic); Piles For Constructional Works Other Than Metal Piles; Pillars And Posts Of Concrete Or Reinforced Concrete; Cement Bricks; Roof Tiles (Non Metallic); Roof Covering And Constructional Materials (Not Of Metal); Flooring Construction An...