High Density Mobile Storage places the cabinets on a track. The cabinets move via a crank handle or manual motion. Stationary file cabinets are available up to 8 tiers, in widths of 36", 42", or 48". The rotary cabinet has shelves in front and back, with solid sides to close and lock the cabinet.   WORK-RITE/SIT-RITE CO. 92 Bonny Lane Suite 57 N. Andover, MA 01845 email: info@WorkRiteSitRite.com Toll Free: (877) 748-7483 Tel: (978) 794-3559 Fax: (978) 794-3961