Dukuge 12.2" 40 lb Gas Struts for Camper Shells & Toolboxes — 2-Pack, Soft-Close, 12.20"/7.48"

Dukuge C16-11028 are 12.2-inch, 40 lb (178 N) gas struts sold as a 2-pack to replace worn lift supports on camper shell windows, truck caps, and toolbox lids.

These gas struts are built to restore smooth, controlled opening and secure holding for a variety of aftermarket and OEM accessories. Designed as a drop-in replacement for many common part numbers, the pair arrives with a simple guidebook and matches the compression/extension dimensions most truck cap and topper users need. The pistons use a 6mm thread and 10mm connector hole to fit popular mounting hardware; verify your measurements before ordering to ensure compatibility.

How do these struts improve lid and window operation?

Once installed, the Dukuge struts provide steady lift assistance so lids open with less effort and stay supported in the open position. The 40 lb (178 N) force is calibrated to assist but not overpower typical camper shell windows and toolbox lids that weigh 32–40 lb. The gas-filled design also cushions closing, reducing slams and wear on hinges.

• 40 lb (178 N) gas force for balanced lift and hold
• Soft-close action to reduce impact and noise
• 12.20" extended / 7.48" compressed hole-to-hole lengths
• 6mm thread and 10mm connector hole for common brackets

Which vehicles and accessories are these compatible with?

The C16-11028 struts are intended as replacements for a wide range of truck caps, camper shells, and accessory lids. They list interchange numbers used by many manufacturers and fit many popular topper and toolbox applications when dimensions match. Always cross-check your existing part number or measure hole-to-hole length and required force before replacing.

• Interchange list includes C1611028, 7009-2PK, 21-0556-06 and more
• Commonly used on ARE, Leer, SnugTop truck caps and toppers
• Also compatible with WeatherGuard toolbox lids and similar accessories
• Best fit for lids weighing roughly 32–40 lb

How easy is installation and what hardware is needed?

Installation is straightforward and can often be completed in minutes with a flat screwdriver and basic hand tools. These struts are offered as a direct swap: remove the old unit, bolt on the new one, and test the motion. If your original brackets are worn or missing, compatible mounting brackets are available separately or as bundle options.

• Typical install: pop off old ball socket with screwdriver, attach new strut
• Connector hole diameter 10mm — fits common ball studs
• Thread diameter 6mm for standard mounting hardware
• Guidebook included; additional brackets sold separately

Will these struts last outdoors and under regular use?

The gas cylinder and piston finish are made for routine exterior use on vehicle accessories, offering consistent lift force over many cycles. As with any gas strut, longevity depends on environment, exposure to salt or corrosive agents, and frequency of use; periodic inspection of seals and mounting points is recommended to maintain safe operation.

• Gas-filled piston for consistent performance cycle-to-cycle
• Durable finish to resist routine outdoor exposure
• Inspect seals and brackets periodically for best lifespan
• Replace in matched pairs to ensure balanced operation

Who is this for: The Dukuge C16-11028 12" 40 lb gas strut 2-pack is aimed at truck and topper owners, RV and camper shell users, and anyone repairing or upgrading toolbox and accessory lids. It suits DIY mechanics and professional installers who need a reliable, dimension-matching replacement for common OEM and aftermarket part numbers. Verify the hole-to-hole lengths, force requirement, and connector sizes listed here before purchase to ensure a proper fit.