Brick->Hollow Blocks->25′ GT-ASM25 25′ Asmolen Brick Dimensions (cm): 25x20x40 Weight (kg/piece): 10.50 Thermal Conductivity (λh) : 0.37 W/Mk Volume Weight (kg/m3): 525 The Flexural Strength : 250 kgf Height of Apron (min): 30-35 cm Volume (pcs/m2): 10 Volume (pcs/m3): 50