Patented technology is designed to allow hot air convection, which enables the individual zones to be controlled by maintaining the quality of the product. The innovative technology of Flexeserve Zone® gives the versatility of tailoring the hot food offerings, reducing product waste from the ability to turn zones on or off predicated upon the time of day and customer demands! DESIGNED TO ALIGN WITH OLYMPUS V AIR-SCREEN GRAB & GO REFRIGERATORS!