This Avantco 178544159 lid is a perfect replacement for the one that came standard with SS-PT-71M-HC and APT-71M-HC sandwich prep tables. A working lid is vital to ensure that your prep table operates to specification, sealing in cold air for optimal temperature retention when you're not using the food pans. A damaged lid can allow excess air to escape, causing the refrigeration system to work harder to maintain temperature, or to be unable to maintain safe holding temperatures at all, so be sure to fix a broken one promptly.