DURABLOCK RFA (24x12x4.5) is Pre-cast Pre-fired Refractories Shapes in India by Calderys refractories. These Oil-fired Furnaces, Gas Fired Furnace, Highly Controlled Environment, Soaking Zone, Reheating Furnace, Pusher Type Reheating Furnace have High Abrasion Resistance, High Hot Strength, High Packing Density and Low Porosity.