TheSpecialized Air Tool Flex Hose Pumpuses an inverted camber design that allows for quick fill-up on mountaintyresbut can still reach the high pressures needed for roadtyres. Specialized Air Tool Flex Hose Pump Features Twin Schrader and presta thread on T-head Inverted barrel design allows for efficient high volume and high pressure pumping Lightweight and compact hose with built-in flex to prevent excess stress on valve stems Water bottle boss mount included