Ceramic firebrick can be used for insulating wood stoves, furnaces, barbecues, firepits and more. Designed to fit most applications, 4.6in. x 9in. firebrick withstands temperatures up to 2200deg F. ASTM tested and approved. Common Usage: Insulating stoves, Dimensions L x W x H (in.): 9 x 4 1/2 x 1 1/4, Includes (qty.): (6) Firebricks, Works With: Wood stoves, furnaces barbecues, and more