This Avantco 18930001 black probe is a direct replacement for the one that came with your Avantco refrigerated air curtain merchandiser. The temperature controller inside your Avantco refrigeration equipment relies on a functioning probe to accurately read and adjust the temperature. Replace a worn or damaged probe right away to ensure your unit is operating at food safe temperatures. It's compatible with Avantco WVAC and BVAC series refrigerated air curtain merchandisers.