This Justrite® Piggyback flammable cabinet provides additional safety storage without taking up valuable floor space. Piggyback cabinet mounts to top of Justrites standard 30 and 45 gallon flammable cabinets and can also be placed on counter tops or stacked to provide additional storage (Note: cannot be used with sliding door cabinets). Double walled 18-gauge all-welded steel with 1 1/2" insulating air space helps keep temperatures from rising. This safety storage cabinet includes a built in grounding connector. The dual 2" vents of this flammable cabinet can connect to an exhaust system. Safety cabinet has a 2"D leak proof doorsill to contain spills. Doors have full length piano hinges. Justrite® Flammable Cabinet has a recessed paddle handle with cylinder lock and padlockable latch for security. Stainless steel 3-point self-latching system provides positive door locking. 350 lb Galvanized Steel Shelf features a SpillSlope design that direct spills to back and bottom of safety cabinet. Includes adjustable leveling feet for uneven floors. Durable powder coat finish with Haz-Alert trilingual reflective warning label provides high visibility. Justrite® Flammable Liquid Cabinet complies with the National Fire Protection Association Flammable Combustible Liquid Code #30 and OSHA standard 1910.106 for flammable storage of 1, 2 and 3 liquids. FM approved. 10 Year Limited Warranty.