Merritt DEF Storage Box 18 (H) × 28 (D) × 12 (L) In Aluminum with Diamond Plate Door With Two Rows of Louvers on Front Model 3631Merritt DEF Storage Box 18 (H) 28 (D) 12 (L) In Aluminum with Diamond Plate Door With Two Rows of Louvers on Front Model 3631 You can store four one gallon jugs or two 2. 5 gallon jugs. Mounting Kit is welded inside and can be mounted from either end. Utilize unused frame space and add outside storage for your DEF Products. Heavy Duty designs on all DEF boxes for longer life. These boxes utilize Merritts Bullet hinge with 1 4 S S pivot, for no trouble