The Adjustable Height Aluminum Gantry Crane with Pneumatic caster AHA-15-15-12 combine lightweight and rigid construction into one unit. The all aluminum construction of this gantry crane makes it corrosion resistant and perfect for outdoor use. The lightweight I-beam allows height adjustment without the need of a hoist or fork truck. Features quick setup design. Included are two (2) straps, allowing transport of the gantry crane in one neat package. Facilitate easy mobility from one area to another with four (4) 8" glass filled swivel casters with four-position locks on the 2,000 and 4,000 lb capacity models, while utilizing phenolic casters on the 6,000 lb capacity units. Height is adjustable in 6" increments. Do not move units while loaded. Hoist and trolley can be ordered separately.