... , High quality 3, Competitive price 4, Deliver fast Product description:Cylinder material: Steel, SS304, SS316, AlloyShaft material: Steel, SS304, SS316Cylinder ... than 100 hours.Fatigue test: decay less than 9% after 20,000 cycles.Service life: at least 50,000 cycles in ... days.Our advantage:1, We have engaged in automobile gas spring producing for more than 1 decade. Now , our products branch into ...