Air bearing caster power source is compressed air, moved your heavy duty equipment easier and more flexible. Air bearing caster also called air rigging system, air moving rigging system, air powered heavy load moving equipment, air skate, air dolly and so on. Air rigging system moving your equipment with no shake and no pollution, and will protect your floor. Air powered heavy load moving equipment normally used on moving precise instrument, armarium, and other can not shake loads when moving. Air rigging system normally used on epoxy resin and other expensive floor, will protect your floor from damage. Regarding how to operate the air dolly, and the price of the air bearing caster, please feel free contact with us. more details will be sent to you immediately. Shan Dong Finer Lifting Tools co.,LTD Email:sales@cargotrolley.com http://www.cargotrolley.com/