Serfas Grifter Mini Hand/Floor Bicycle Pump with Gauge Capable of getting you to extremely precise inflation pressures The switch valve & simple valve designs enable switching between Presta or Schrader valves, while the dual head offers both Our simple screw-on and Quick draw head designs both screw on the valve for a secure fit, even at high inflation pressures Mini pump size with floor pump versitility External hose that features easy to read gauge Presta and Schrader compatible Intergrated foot peg for easy control