IMPORTANT: This firebrick set is for the Older Advantage Models, Please check your serial number before ordering. Fits Whitfield models Advantage I (serial numbers: 1001 - 7400) and Advantage II (serial numbers: 7401 - 18144). The brick Height is 13-7/8". It replaces 24220200 - To determine if this is your correct firebrick, check the serial number and the height of your current board.