Sturdy all welded double wall steel construction with 1. 5" air space 2-Inches wide louvers support shelves, adjustable on 4-inches centers 2” Deep leak proof sump. 2” Bunged air vents with flame arrestors on each side of the cabinet allows for ventilation. Safely contains hazardous chemicals, reducing the risk of fire. Fully Assembled. Improved security with recessed lockable paddle latch and 3 point locking system. 4 Leveling feet for uneven floors.