Masterbuilt 10100106 Kingsford Barrel-Grill Firebox Attachment Firebox attachment makes it easy to smoke meat on the side Attaches easily to Masterbuilt's KB800 or 10040806 Barrel Grill Heavy-gauge charcoal tray; top and side charcoal-access doors Convenient side air damper helps regulate the temperature Measures approximately 18-1/5 by 15-3/5 by 16-2/5 inches