These Avantco 19386426 starter compressor components are a direct replacement for what came with your Avantco air curtain merchandiser. These starter components ensure your unit's compressor (sold separately) works correctly, helping your unit dissipate heat and keeping the cabinet set to the right temperature. Be sure to replace broken or missing components promptly. These starter components are compatible with Avantco MAC-48HC, CAC-48, and CAC-36 air curtain merchandisers.