Corundum Mullite Bricks have stable quality and excellent durability. These products are made mainly of cordierite, mullite, and corundum of high purity. These brick have low porosity, excellent hot strength and creep resistance, and good volume stability at high temperature Advantage 1.Low thermal conductivity 2.High cold crushing strength 3.Perfect Energy saving 4.Stable volume 5.Excellent heat insulation 6.High intensity for pressure 7.Good thermal shock stabilityWholesale Refractory Bricks website:http://www.refractory-ceramic.com/refractory-bricks/