Prestacycle Quick-Click Presta Big Head THE BEST FEATURE - This head is perfect for Tubeless tires and any Presta valve. INCLUDES - Newest version of the Mini Presta Head Gasket using Urethane Elastomer. QUALITY - It lasts more than 5 times longer, gives a better seal and flexes to work anywhere along the Presta shaft for better tubeless tire application. PUSH ON/ PUSH off  The fastest way to get you going. COMPATIBILITY - Compatible with Silca pumps and can be adapted to other pump brands with our optional Schrader barb or our floor pump replacement hose.