TheMicroplate Storage Rack provides a handy storage option for standard plates. Plates fasten securely to the rack with an easy-to-use locking bar. Polypropylene and metal construction is lightweight and durable, and the rack is freezer compatible to -112F (-80C). Top and side handles for easy transfer and removal of racks. The 10- and 20-plate sizes are a single column, while the 50-plate rack holds 10 plates high and 5 plates wide. The aluminum style features adjustable shelves.Note: Not for use in liquid/vapor nitrogen.