This Avantco 178SHLFUBB37 21 5/8" x 21 1/4" shelf works with your UBB-378 back bar refrigerators to keep your cans or bottles of beer, cider, or soda organized! Use it to replace a broken or missing shelf, or add it to your unit to increase storage capacity. This shelf is made of plastic-coated steel. Shelf clips are sold separately.