Concrete Blocks Block Type QTY Per Bale Weight Per Bale (Approx Kg) 4” blocks 44 880 6” blocks 32 880 9” Cavity blocks 20 480 12” cavity closer. 33 880 Stock brick 128 400 4” soaps 88 850 6” soaps 66 850 L – blocks 16 350 Squint blocks 16 350 4” Thermal Blocks 72 580