LEZYNE CONTROL DRIVE CO2 PUMPThe Control Drive is compact CO2 system with a specially designed CNC machined aluminum dispenser that has a control knob so you can control the flow of CO2. Twin Slip Chuck head presses on to Presta and Schrader valves. Neoprene sleeve insulates hand from cold during discharge. Compatible with threaded CO2 cartridges. Includes one 16g or 25g cartridge. Features CNC machined aluminum dispenser Includes 16g or 25g CO2 cartridge Includes neoprene sleeve Fits presta or Schrader valves16g (without cartridge) | Lezyne | Control Drive Co2 Pump | Black | 16G