LEZYNE Alloy Drive CO2 Inflator (Black) CNC-machined aluminum CO2 inflator with an integrated canister for safely storing a CO2 cartridge. The canister body also insulates from cold during inflation. The Twin Chuck head threads directly onto both Presta and Schrader valves for secure valve engagement. The Trigger Valve Operation allows for easy and precisely controlled inflation. Compatible with threaded 16g CO2 cartridges.