Firecat Catalytic Combustor ACI-21 | Buck Corp. | Clayton | Hardy MFG Company | New Buck Corp. | US Stove 16 Cell Un-canned Combustor Shape: Square/Rectangular Dimensions: 6" x 6" x 3" Shipping Weight: 2.00 lbs. USE THIS PRODUCT FOR THE FOLLOWING STOVES: Buck Corp. - Clayton Buckmaster Clayton - All Models (1992 and After) Hardy MFG Company - Early Models Pre 1995 | New Buck Corp. - Clayton Buckmaster | US Stove - Clayton 60B/70 1992 And Later FREE GROUND SHIPPING in the Contentental US. Cannot ship to PO Boxes. USUALLY SHIPS IN 5-7 BUSINESS DAYS