The Foba STAPI Telescopic Extension is part of the Combitube System. The STAPI extends from 28.74-70.47" (73-179cm). This 3 section upright has a female Combitube connector at the bottom. It may be combined with other Combitube sections for additional height. Its top has a fixture adapter and an additional 3/8" thread. The lower tube contains a shock-absorbing spring. The Foba STAPI works with the CESRO, STARE and CESRA bases (available separately).