Air rigging moving trolleys has four or six air load modules to suit any size and shape of the heavy duty loads which need to be moved.  Air bearing and casters can be used at various points under a load, which is particularly for odd shaped loads.Shan Dong Finer Lifting Tools co.,LTD produced air rigging system for more than 20 years, now, have following models: 10 tons air bearing caster, 16 tons air rigging loads moving system. 20 tons air roller skate, 32 tons air rigging system, 48 tons air load moving dolly. Air bearing casters structure, air rigging system operating principles, air roller skids pictures please contact us.