Refractory Brick's Standard size ( 230x115x75 mm ) But we make all sizes of bricks as per Requirement. Alumina ( AlO) - 70 % The weight of bricks is 5.2 KG Bulk density (B.D) - 2.6 Apparent porosity % Max - 22 Ferric ( FeO) % Max - 2.5 Cold Crushing Strength - 500 kg/cm RUL Temperature % MAX - 1480 PLC Temperature % MAX - 1500