For straight clamps (and seals), the design requires a solid, non-expanding portion at each end followed by a transition area where the expansion gradually increases until it reaches full expansion height. In most instances, special inflato-boot or inflato-plug ends are used to promote cycle life. Unlike solid ends, inflato-style ends do not have a hard transition between the non-inflating (i.e. solid) and inflating portion of the clamp. Because of this, cycle life is greatly improved. If the design requires a connector out one or both ends, then extend­ed ends may be required. Extended ends are also required if pressure plates are used.

To increase cycle life and reduce the stresses on the ends, pressure plates may be used.