The ORIGINAL high-quality stackers for your Harvest Right Freeze dryer trays (fits all size trays). High quality HDPE plastic is food-grade, dishwasher safe, and won't bend or break (even at freezing temperatures). Designed and made in the USA, these stackers make preparing your freeze-dried food easier and helps save space in your freezer or on your counter. Fits all small, medium, large, and XL Harvest Right trays. Small Set (stacks 4 trays - 12 pieces). Medium Set (stack 5 trays - 16 pieces). Large Set (stacks 6 trays - 20 pieces). X-Large Set (stacks 7 trays - 24 pieces). Will only fit Harvest Right brand freeze dryer trays. Trays are not included.