These tray dividers are specifically made to fit the Harvest Right freeze dryer trays perfectly. Divide your food into portions and make it easier to plan and simplify packaging. Each set contains 4 dividers that fit perfectly in a single tray. Each divider includes a removable insert that gives you the option for a full or half portion. Features: Compatible with our Tray Stackers Injection-molded, HDPE (food grade) plastic Dishwasher safe and doesnt get brittle in the freezer Medium Set, Single Tray Contains: (4) 4.25" x 6.75" dividers and (4) removable inserts Each divider can be used with or without the removable inserts, creating multiple portion size combinations.