Lezyne Trigger Drive CO2 Dispenser with Anti-Freeze JacketA durable CO2 dispenser constructed from CNC machined aluminum, the Trigger Drive CO2 features trigger valve operation for easy inflation and a Twin Chuck head which threads onto both Presta and Schrader valves. A neoprene sleeve insulates your hand from the cold during discharge. **Please note that this is just the dispenser. CO2Carttridge should be purchased separately.