Use MEECO'S RED DEVIL Firebricks to replace broken or cracked firebrick in wood or coal stoves, furnaces and fireplace inserts. Every wood burning stove with fire brick liners will need to have its bricks replaced on a regular basis to keep the stove performing at optimum efficiency. Can also be used for building new fireplace fireboxes or outdoor firepits. * Each brick measures 9" x 4-1/2" x 1-1/4". Withstands service temperatures up to 2400 deg F Meets ASTM C-16, C-20, C-38, C-113 & C-133 Meets ASTM C-16, C-20, C-38, C-113 & C-133.