All masonry fireplaces require fire brick be used for the construction of the firebox; A quality light duty fire brick that conforms to ASTM C-27-70 should be used; 9" x 4.5" x 1.25"
Width: 4.5"
French Name: Brique réfractaire complète de 9 po x 4-1/2 po x 1-1/4 po
