CNC-machined aluminum dispenser Control knob twists for easy inflation Twin Slip Fit head presses onto Presta and Schrader valves Neoprene sleeve insulates hands from cold during discharge Available with one 25g CO2, or as a head only Compatible with threaded CO2 cartridges only A durable CO2 dispenser constructed from CNC-machined aluminum, the Control Drive CO2 features control valve operation for easy, precisely controlled bicycle tire inflation and a Twin Slip Chuck head which presses onto both Presta and Schrader valves. A neoprene sleeve insulates your hands from the cold during CO2 discharge. Available with a 25g cartridge, or as only the inflator head.