Airace Bike CO2 Tire Pump Inflator, Reversible Presta and Schrader Air Valves, with CO2 Cartridge Sleeve (Catridge is NOT INCLUDED) Black micro CO2 pump is a compact and super micro size CO2 inflator. User-friendly design for controlling the air release by twisting the CO2 cartridge from left to right. A CO2 cartridge can mount into the bottom of the pump inflator for better functionality while using on bike tire. Can be used interchangeably between Presta and Schrader air valves. The Inflator comes with a detachable CO2 cartridge sleeve for easy grip when in use.