Sea-Dog Gas Filled Lift Spring - 15" - 20#

The Sea-Dog Gas Filled Lift Spring – 15" – 20# is a precision pneumatic support component engineered for reliable hood, hatch, and enclosure actuation in automotive, marine, and RV applications. As a mechanic familiar with modern vehicle maintenance, you'll recognize this as a gas strut—a sealed cylinder containing pressurized nitrogen that replaces conventional mechanical springs to provide smooth, controlled lifting force. Built to marine original equipment standards, this 15-inch unit delivers 20 pounds of lift force and serves drivers, technicians, and restoration enthusiasts who demand durability and consistent performance across demanding environments.

Gas struts function through sealed nitrogen pressurization, which creates a linear force curve superior to mechanical springs—maintaining constant lift pressure throughout the stroke without the fade or sag that happens with traditional coil or leaf springs over time. The 20-pound rating indicates the force at full extension, making this unit suitable for lightweight to mid-weight applications where controlled, hands-free operation is critical. Sea-Dog's manufacturing adheres to marine OE tolerances, ensuring precision-bore cylinders, high-quality seals, and corrosion-resistant rod finishes that resist salt spray and moisture—attributes that translate directly to extended service life in any moisture-prone environment, from coastal automotive shops to RV storage bays.

This 15-inch gas-filled lift spring excels in tonneau cover assemblies, truck bed enclosures, hood and trunk hinges, and access door mechanisms where weight support and repeatable cycling matter. The compact 1 x 1 x 16-inch envelope fits tight mounting brackets, and the lightweight 0.25-pound design minimizes load on hinge hardware and reduces stress on attachment points. Installation requires matched-pair mounting at both lift points; verify your application's force requirement and stroke length before purchase. All Sea-Dog gas springs ship with a comprehensive 2-year warranty, reflecting confidence in long-term reliability through thousands of open-close cycles.