Alumina Bricks

30 % alumina brick 35-38% alumina bricks (std 9x 4 ½ x 3” only) 40% alumina bricks 50% alumina bricks (std 9x 4 ½ x 3” only) 60% alumina bricks (std 9x 4 ½ x 3” only) 70% alumina bricks 80% alumina bricks (std 9x 4 ½ x 3” only).