This Avantco 19386430 extra-large stainless steel shelf step is a direct replacement for the one that came with your Avantco air curtain merchandiser. Use it to replace a worn or missing part to keep your unit operating efficiently. It's made of durable stainless steel. This step allows your air curtain merchandiser to showcase your product better. It's compatible with Avantco HAC-63-W, HAC-63-B, and CAC-60 air curtain merchandisers.