Equipment lifts for A/C coils, furnaces', garage heaters, will lift 500 pounds approximately 8 feet, but 4 ft. extensions can be added to go to 12 ft.. uses a winches crank handle to raise up/down, on caster wheels to move around. Extra 3 or 4 ft. post are available from MPLS< MN supplier. Original cost over $3500.00 Very good condition have two available for sell.