Hindustan Hitech AAC Blocks - 600mm x 200mm x 225mm (9"),Block features light weight 50% lighter than normal clay brick. faster construction 3 times faster than traditional brick masonry work. high fire resistant 4-6 hour depending on thickness ( 4 hour's for 100mm thick wall excellent heat insulation 5 time's superior to clay bricks. noise absorption far superior than traditional clay bricks. environmental friendly reduces at least 30% of environmental waste. Decreases over 50% of greenhouse radiation and over 60% integrated energy on the surface of brick. durability do not suffer from high transit breakage therefore ara are easy to transport when com pared to clay bricks. weather & earthquake resistant the impact of earthquake forces on a structure is proportional to the weight of the structure, provides excellent resistance to earthquake forces.