Popular aftermarket replacement gas springs. Attwood's line of stainless steel gas springs offers even greater durability. The pressure tube and rod are made of super-tough #316 stainless steel alloy. All other exposed components are marine-grade stainless steel or composite. They can be used in saltwater and any other application where good looks and quality truly matter. They are the best springs you can buy for livewells, line lockers, deck hatches, and other moisture-prone areas.