These packs of 2 spacer rings are perfect for extending the things you can dry with your dehydrator. Buy spacer rings to go between trays for drying taller items like nuts, prune plums, mushrooms, tomatoes, slices of figs and apricot halves.
Anything that is taller than a standard tray depth will stick to the tray above it unless you use a spacer ring. A spacer ring is just a tray with no bottom that acts to double the depth of the trays. Each spacer ring is 35mm deep.