These popular aftermarket stainless steel replacement gas springs offer more durability than ever before. The pressure tube and rod are super-tough #316 Stainless Steel alloy and all other exposed components are either stainless steel or marine-grade composite. Ideal for saltwater use or any other application where good looks and quality make a difference. Perfect for livewells, line lockers, deck hatches, and other moisture-prone areas. Extended 12" Compressed 8.5" Stroke 3.5" Socket 10mm Composite Force 40 lbs. Rod 8mm