This Avantco 17811473 defrost element is a direct replacement for the one that came with your Avantco unit. It is a vital part of your unit's defrost system, working with the other components to help your unit remove ice buildup. A broken or malfunctioning element can prevent your unit from maintaining specifications and cause strain on other components, so be sure to replace it promptly. It's compatible with Avantco SS-3F-HC freezers.