In many applications to 1200C, ZIRCAR Ceramics’ Alumina Silica Type AXL is a self-supporting high temperature thermal insulation capable of spanning fairly large distances. The 1.5” thick half-Octagon sheets are used in a large crystal growing process. Complete information about AXL can be found on our website using this link. https://www.zircarceramics.com/product/axl/