Brick->Hollow Blocks->20′ GT-ASM14/20 14′ Asmolen Brick Dimensions (cm): 14x20x39/25 Weight (kg/piece): 4.70 Volume Weight (kg/m3): 529 Volume (pcs/m2): 13 Volume (m3): 112.5 1m3 Weight/m3: 529 1m2 Weight/m2: 61 Height of Apron (min): 20 cm