CO2 cartridges are encouraged to come as they are because the Planet Bike Airship CO2 Inflator does not discriminate between threaded and non-threaded canisters. Constructed from a lightweight composite, the Airship has a dedicated mission of getting your tires inflated and getting you back on the road in a flash. Compatible with both Presta and Schrader valves, you won't want to leave the house without the Planet Bike Airship CO2 Inflator.