Sorting/distribution rack is ideal for offices, shipping rooms, mailrooms for filing, sorting and collating. Shelf heights can be adjusted to fit your needs. Nine pullout shelves adjust to form a combination of 12 1" or 2" high compartment openings. Versatile shelves adjust to 1" on center slots to fit thick books, binders, or manuals. Order additional shelves (sold separately) for uniform compartment sizes that can serve as a mail center. Pullout shelves allow easy access when loading or retrieving contents and feature label holders so you can customize content identification to fit your needs. Durable heavy-gauge steel has scratch-resistant, chip-resistant finish to withstand everyday use. Units are stackable.