Brownell Air-Powered Boat Lift 3,000 lb Capacity. Powered by pneumatic driven hydraulic jacks. Includes a 25' air hose and moveable hose hanger. One person can operate all four lifts simultaneously with a standard pneumatic manifold allows available from your favorite tool supplier. Jacks are lowered individually. Full speed operation requires 15-20 CFM per jack at 120 PSI. Lifting possible as low as 10 CFM at reduced speed. SWL 3,000 lbs per jack. Complete system utilizes four jacks. Adjustable base and arm. Safety pins for added protection. No-flat 10" tires and hand grip for easy mobility. Lifting range 20" - 50". Weight: 300 lbs.