A precision High Volume floor pump * Optimized for use with mountain bike tires * Made with a CNC-machined aluminum barrel and base, steel piston, and varnished wood handle with an oversized contoured grip * The barrel, piston, hose, and connectores are oversized to deliver doube the air flow per stroke * ABS Flip-Thread Chuck and a 43" hose easily reach your Presta or Schrader valves