Heavy-duty welded aluminum build: Ensures long-lasting durability for rugged use
Weatherproof bulb seal: Protects contents from dust, water, and road grime
Dual door design with adjustable gas struts: Allows flexible access and keeps top door clear of mounted gear
Integrated MOLLE panel: Enables secure attachment of tools and accessories
Adjustable full-depth shelf: Helps organize and maximize storage space
Summarized by Shop
Enjoy more storage space and peace of mind with our heavy-duty, lockable Rear Storage Box. It’s large enough to add six cubic feet of storage but compact enough to leave room for other gear on our Rear Door Platforms.
This heavy-duty storage box is fully welded from high-grade aluminum with reinforced structural support and has a weatherp
Material
High-grade aluminum
Weight
65 lbs
Overall Dimensions
30.25 in tall x 24 in wide x 18 in deep
Opening Dimensions
26 in tall x 21.26 in wide
Interior Dimensions
30 in tall x 23.5 in wide x 14.75 in deep
Includes
4 hex bolts for mounting, 1 full-depth adjustable shelf (additional shelves sold separately)
Summarized by Shop
4.9
29 ratings
5
4
3
2
1
Great product, install was a breeze
Great product. Opens up more storage opportunity for my van and the installation was a breeze. The box is solid! I purchased with the small storage box as well (top).
S
Sawyer · May 15, 2026
Van Storage Boxes and Door Rack
We chose Flatline products because they top of the line. We have found the installation is very straight forward and the parts fit together very well.
We are looking forward to using the Flatline storage boxes to hold most of our gear on our Dodge ProMaster van on our trip thru the southwest and the up length of the Pacific Coast Highway this summer.
J
James · April 20, 2026
Back Big Box?
Box arrived quickly, very well protected by packaging with no damage. Installed carefully and quickly with a buddy helping hold and align to mounting holes. The install video guy says " locktite" was included in hardware kit. Not in mine.