Bike Pumps Zipp

Bike Parts Wheels Zipp Adapter Valve Paracular. Features:New synthetic elastomeric seal with 2X power retention and 5X wear resistance of traditional sealing materialsNew, dual stage seal design, improves sealing and stability on Presta valve stem assemblyAdjustable pressure, user can tighten the cap to increase power retention 4X and compensate for the 15 degree stem angle reduces stress on the valve stem from the pump hoseFeatures:Weight: 12.0 g