Air bearing movers has super low friction. Air bearing movers power source is compressed air, via the compressed air formed a frictionless air film, this air film allowing heavy loads moved manually and maneuverable. Air casters provide omnidirectional movement, requiring no additional force to change direction. Air craft transporters is lower profile which makes it easily to insert under almost all of equipments or bulky loads to maneuvered in tight spaces. Air caster rigging systems provide maximum versatility when transporting loads of various widths and lengths. Air bearing casters capacity from 10.0 tons to 48.0 tons. And, can be make especially for you if you contact with us. Shan Dong Finer Lifting Tools co.,LTD Email:[email protected] Website: http://www.cargotrolley.com/