This Avantco 178GSKT10903 vinyl front door gasket replaces the top and bottom gasket that came with Avantco MC49-HC milk coolers. The gasket is a vital part of your unit's drawer assembly, locking in cold air so that the refrigeration system only runs when it needs to. As the gasket ages, it may lose its seal or develop cuts and tears that allow cold air to escape, and over time this may force the refrigeration system to run more frequently to maintain temperatures. Inspect your gaskets regularly and replace when it's time to help keep operating costs low and save on your maintenance bill!