The Lezyne Pressure Drive CFH mini pump provides two ways to inflate your tires. The pump features an oversized piston and shaft that lets you 'pump up' your tires with far fewer strokes than a conventional mini pump. Additionally, the pump's steel braided flex hose can be threaded directly onto any threaded CO2 cartridge for super-fast inflation. The Flip-Chuck on the reverse end accommodates Presta or Schrader valves. Mounting hardware attaches beneath your bottle cage to secure the pump and one CO2 cartridge. 100% CNC-aluminum construction. Pump rated to max 120 psi.