This product is designed for Mrcool, Lenox furnaces. It's a return Air Base Kit  for size  B cabinets. Mrcool, Lenox part #68W62, it measures  17 1/2" X 26 7/8" X 7  1/4" tall.  This quality product is hand fabricated in Virginia using American made sheet metal. Manufactured from 26 gauge galvanized metal with 22 gauge metal support rails that have a 1" hem edge for increased strength. This is a complete kit that comes shipped flat to save on you money and time. It comes complete and includes foil tape, sheet metal screws, four slips, 4 sides, and one bottom cap. It comes with assembly instructions and a link to a video that demonstrates  the assembly of the box. We are a full service fabrication shop able to produce the highest quality ductwork at a very reasonable price. Please check our eBay store as we are constantly adding new products and reducing prices. If you're interested in purchasing more than one item from our store you will receive significant discounts, the more you purchase the cheaper everything is priced. We thank you for purchasing from us and supporting our business. We are always here to assist you, and we can not wait to help you complete your HVAC installation.