A retractable hose coupled with a unique valve core-tightening tool, and a sleek profile to push air into your tires efficiently. Flexible Hose Takes Stress Off Valve Stem We heard you loud and clear, our Core mini pumps were a little too long and after years of testing, the Airstik mini pump is the perfect size to fit in a jersey pocket or a hip pack. Our Presta dedicated thread-on head sits on a pull-out hose to give more options on which position you pump from and puts less stress on the valve. Nervous about unthreading that valve when removing the pump? Enter one of the Airstik&';s awesome features: the Presta Valve Core Tool. Simply unthread the tool from the back of the pump and tighten your valve prior to threading the hose on.