100% CNCmachined aluminum construction\n Oversized piston and shaft integrated into a compact overall design\n Reversible Presta/Schrader hose stows inside handle when not in use\n Equipped with ABS (air bleed system) chuck to allow release of back pressure and eliminate the chance of unthreading Presta valve cores\n Inflates to riding pressure quickly with 30% fewer strokes than conventional pumps\n 120psi/8.3bar max