CAUTION: Please double confirm the fire bricks size before you place the order to prevent the bricks can't fit your stoves or fireplaces and waste your time to re-order. Vermiculite Material Fire Bricks - Can withstand high temperature of 2200F, has strong thermal insulation performance, help you save woods and money. High-strength Firebricks - Not as brittle as clay bricks, and it's also not easy to peel off after burning. Size 9″ x 4.5″ x 1.25″- Common size firebricks for most of the stoves and fireplaces replacement, same size as service part 1-00-900450125 for Harman, FBP6E for US Stove. Precise size - Easy to install and won't leave gaps. Flat Surface Firebricks - Ensure that the combustion chamber is sufficiently flat after installation, beautiful and easier to clean. Caution - This firebricks temperture rating is 2200F, are available for wood stoves or fireplaces, do not available for forging ovens.