Our High Density Bricks and Blocks have very little air voids and hence very Low Water Absorption as compared to Traditional Red Bricks or Fly Ash Bricks. This helps keep painted walls SEEPAGE FREE. The smooth finish and standard size of our Bricks and Blocks means use of LESS PLASTER. www. indusbricks. com Solid Blocks (Avg. 1,000 psi) 4" (290 x 90 x 190 mm) 6" (290 x 140 x 190 mm) 8" (290 x 190 x 190 mm) Hollow Blocks (Avg. 800 psi) 4" (390 x 90 x 190 mm) 6" (390 x 140 x 190 mm) 8"... Our High Density Bricks and Blocks have very little air voids and hence very Low Water Absorption as compared to Traditional Red Bricks or Fly Ash Bricks. This helps keep painted walls SEEPAGE FREE. The smooth finish and standard size of our Bricks and Blocks means use of LESS PLASTER. www. indusbricks. com Solid Blocks (Avg. 1,000 psi) 4" (290 x 90 x 190 mm) 6" (290 x 140 x 190 mm) 8" (290 x 190 x 190 mm) Hollow Blocks (Avg. 800 psi) 4" (390 x 90 x 190 mm) 6" (390 x 140 x 190 mm) 8" (390 x 190 x 190 mm) Higher strengths can be made on order. Show More