The Air Tool Flex Pump uses an inverted camber design that allows for quick fill-up on mountain tires yet it can still reach the high-pressures needed for road tires. Twin Schrader & Presta thread on T-head. Inverted barrel design allows for efficient high volume & high-pressure pumping. Lightweight & compact hose with built-in flex to prevent excess stress on valve stems. Water bottle boss mount included. Max pressure: 100 PSI (6.9bar) Volume-per-stroke: 30cc