Brick->Hollow Blocks->30′ GT-ASM30 30′ Asmolen Brick Dimensions (cm): 30x20x40 Weight (kg/piece): 13.50 Thermal Conductivity (λh) : 0.37 W/Mk Volume Weight (kg/m3): 567 The Flexural Strength : 250 kgf Height of Apron (min): 35-40 cm Volume (pcs/m2): 10 Volume (pcs/m3): 42