Head & 16g Cartridge; Instant inflation - When you need to inflate a tire quickly, the Control Drive C02 inflator is ready to perform. Simply attach a C02 cartridge, slip over the valve and open the over-sized pressure control knob; Durable materials - This drive is crafted with CNC-machined aluminum with brass internals, so you can count on it in any conditions; Oversized control knob - One simple over-sized control knob allows you to easy inflate your tires; Compatibility - This drive valve is compatible with Presta and Schrader valves