Single drawer stackable filing system with proven fire protection. Fire Resistance: 30 minute for paper, independantly tested - model U2101 UL tested. Stackable up to four high. Full extension drawer glides for ease of use. Accomodates letter sized folders hanging from left to right (as pictured) and A4 folders hanging from front to back. Hanging file folders not included. Keylock. Finished in black. 1 year limited warranty. Lifetime after-fire replacement guarantee.