Mobile DuraShelf 48" x 24" Grid Top Shelving is a tough all-plastic industrial storage solution. Raised on 4" casters making it easy to move around a facility or out of the way for cleaning. Made of high-density polyethylene (HDPE), DuraShelf features easy no-tool assembly. It will not rust, is chemically resistant, and is ideal for HAZMAT storage or maintenance rooms. Each shelf is 2-5/8" thick with a grid top pattern that allows liquids to flow through and promotes air circulation. Shelves are spaced 21-1/2" apart. Available with 3 or 4 shelves.