The Jet DP 9" Straight High Duty Firebrick is a great general purpose high-duty firebrick that can be used for boilers, pottery kilns, backup linings, or any application where moderate temperature protection is required. The dimensions are: 9" x 4-1/2" x 2-1/2"(inch) or 230 x 114 x 64mm. *Please note 456 bricks fit per pallet.*