Replace a damaged shelf or increase the storage capacity of your back bar refrigerator with this Avantco 178SHELFUBB 22 1/2" x 21 1/2" shelf for UBB2 and UBB4 standard depth back bar refrigerators! This shelf is made of durable epoxy-coated wire for easy cleaning and long-lasting durability. It may be used on either the right or left side of the unit and lets you adjust the capacity of your unit by moving the shelf up and down to accommodate different product heights.