METAL CABINET FEATURES- Drawers feature heavy-duty nylon rollers and courtesy stop, rear hood and hinged front document depressor. OFFICE STORAGE- Stack up to 5 units. FILE CABINETS COMPATIBILITY- Safco Products Closed Low Base Model 4997BLR, stack up to 2 units on Safco Products Open High Base Model 4977BL, optional Lock Kit includes lock and two keys Model 4981. DIMENSIONS-Label holder on drawer fronts dimensions 3.25"W x 1 â…ž"H (OD).