This Justrite® Piggyback chemical storage cabinet provides additional safety storage without taking up valuable floor space. Piggyback cabinet mounts to top of Justrites standard 30 and 45 gallon acid corrosive 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. This hazardous chemical storage cabinet includes a built in grounding connector. The dual 2" vents of this acid storage cabinet can connect to an exhaust system. Safety cabinet has a 2D leak proof doorsill to contain spills. Doors have full length piano hinges. Justrite® Safety 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® Acid Corrosive cabinet complies with National Fire Protection Association specifications, OSHA regulations and is approved by the Factory Mutual System. 10 Year Limited Warranty.