The Crank Bros Men's Gem Pump is a compact, lightweight dual-stage hand pump that features patented high-volume and high-pressure switch technology. This pump is made from a hybrid alloy and composite construction for low weight and high strength. The Gem pump is equipped with a convertible head for Presta or Schrader valves, and a patented air switch. The cherry on top, is that this pump includes a bottle cage bracket mount for convenient on-bike storage. Get the best combination of performance and portability with the Crank Bros Men's Gem Pump!