RV Top Lid Boxes
RV Top Lid Boxes are a type of tool / storage box made by Alum-Line designed especially for mounting on the floor behind your pickup cab. The design includes “notched lids” so that the box can sit tight up against the front (bulkhead) without interfering with the shape or other structures of the RV. Any time you need a box to fit up tight against a wall or need a flush fit; our RV box is the answer.
Lightweight Strength That Outperforms Steel
High-strength aluminum delivers durability without unnecessary weight.
Proudly Made in the USA Since 1986
American-built trailers and work products trusted nationwide.
Designed for Commercial & Recreational Use
Built to handle demanding jobs, daily hauling, and custom applications.
Standard Features
Standard features engineered for strength, longevity, and everyday reliability.
- Heavy duty .100 diamond plate or .100 smooth aluminum
- Continuous aluminum hinge
- Gas props on lid (lid strong enough to walk on)
- Key lock stainless double connecting paddle latch with adjustable catches
- Weather tight rubber seal
- Slant top with 3" slope at no additional cost
Optional Features
Optional enhancements designed to tailor your build for specific jobs, loads, and real-world use cases.
- Custom sizes availabe upon request
- Optional sliding storage tray
Popular Sizes
See Our Products in Action
Get a closer look at the design, construction, and real-world performance behind every Alum-Line build.
Decades of experience, trusted by thousands—precision, strength, and reliability in every build.
American-built aluminum products designed for real-world work, backed by three core principles for every product delivered
Built on 40 Years of Proven Craftsmanship
Since 1986, Alum-Line has produced premium all-aluminum trailers, truck beds, bodies, boxes, and specialty transport solutions for customers across the U.S. Our decades of experience shape every weld, panel, and design we build.
USa Manufacturing Power That Sets Us Apart
With over 120,000 sq. ft. of production space, dedicated plants, and continuous expansion, Alum-Line delivers the strength, precision, and consistency needed for commercial-grade performance in every product.
Nationwide Network Backed for years
Supported by 200+ dealers across the country and protected by a five-year workmanship warranty, our aluminum solutions are engineered to outperform steel and built to last a lifetime.
Trailers Built For Hard Work Across America.
With years of hands-on experience and a commitment to quality craftsmanship, we turn raw materials into real-world solutions — from custom industrial parts to full-scale fabrication projects.
Years in Business
120,000 Sqft Manufacturing Facilities
Dealers Across the USA
Where Workmanship Lasts a Lifetime.
Specials
Limited-run pricing on select aluminum builds—grab deals before they’re gone.
New Products
Newly engineered additions built for tougher jobs and higher performance.
Reviews
Hear from Alum-Line customers on their real world experience.
Warranty
Know your coverage and submit a claim for your Alum-Line product.