Brick->Hollow Blocks->25′ GT-ASM18/25 18′ Asmolen Brick Dimensions (cm): 18x25x39/25 Weight (kg/piece): 6.50 Volume Weight (kg/m3): 452 Volume (pcs/m2): 10 Volume (m3): 69.5 1m3 Weight/m3: 452 1m2 Weight/m2: 65 Height of Apron (min): 25 cm