As shown in the diagram below, all lifting capacities in the charts are measured at the maximum effective lifting area (A). As the jack is inflated (B), this effective area decreases (C) due to teh rounded shape of the jack. Lifting capacity also decreases
Highly flexible and lightweight jacks only require an air supply of 116 psi maximum. Any non-explosive gas or water can also be used for inflation.
In rugged testing, jacks are only 1" thick, making seemingly impossible lifting tasks routine.
Heavy attachment straps are provided on 4 largest sizes for attachment of a rope or hook to position the jack from a safe distance.
