Basic Bricks Magnesia Chrome Magnesia Spinel   SiC based Bricks 7% SIC Bricks 15% SIC Bricks 25% SIC Bricks   High Alumina Bricks 50 % Alumina 60 % Alumina 70 % Alumina 80 % Alumina   Fireclay Bricks 30 % Alumina 40 % Alumina   Insulating Bricks 15% Insulating Bricks 40% Insulating Bricks