JK Lakshmi AAC Rectangular Smart Blocks. Measuring 625 x 250 x 150 mm, these blocks are designed to streamline your building process. Manufactured from premium Autoclaved Aerated Concrete (AAC), they offer impeccable thermal insulation, durability, and ease of handling. Choose JK Lakshmi AAC Rectangular Smart Blocks for construction that's both smarter and more efficient.