60 mins. fire protection. Undercarriage on wheels allows for easy movement around the office. UL tested 1 hour for data. Cylinder lock with 2 keys supplied. Locking hole for security seal or additional lock. Honeywell Media Box holding capacity is 100 x 3.5" discs or 54 x 4mm data cartridges, or 40 CD-ROMS. Wheels can be removed.