Firebrick
Firebrick is mainly used to line surfaces to withstand high temperatures, like the interior walls of kilns, pizza ovens, foundry furnaces, boilers, and fire pits. Made with ceramic fiber material, these insulating firebricks (IFB) also help to improve energy efficiency for the places they are used. Full Size 9 x 4.5 x 2.5″ Slim Brick 9 x 4.5 x 1.5″ Mutual Materials Firebrick Colors: Buff, Red, Gray