The Lezyne Control Drive has a dispenser with a control knob for easy, controlled inflation. The Lezyne Control Drive CO2 inflator is a CNC machined aluminium dispenser with brass internals. CNC control knob twists for easy and controlled inflation. Twin Slip Chuck head presses on to Presta and Schrader valves. Neoprene sleeve insulates hand from cold during discharge. This Lezyne control drive CO2 inflator is compatible with threaded CO2 cartridges, comes with either a 16g cartridge, a 25g cartridge or no cartridge WEIGHT: 16g