This Avantco 19386429 small 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 CAC-48 black air curtain merchandisers.