Features: 1. Package includes 12pcs tray stacker. These are perfect for vertically stacking your trays in the freezer. 2. Our tray stacker designed for Harvest Rights freeze dryer trays. The trays allow you to easily stack the trays for less of a footprint when freezing them. 3. Made of high quality plastic. It is very strong and not easily deformed. We extended the original tray stacker to make it taller with a little extra space. 4. Easy to use, tray stacker are easy to take off and put on. You just need to connect them together like a picture. Specification: Material: Plastic Product Color: White, Black, Yellow, Green Product Size: 5.5 x 3.5 x 3cm Product Weight: 9g Package Included: 12 x Tray Stacker