ICO 25g CO2 cartridges bike are the answer to quickly getting you back on your mountain bike or motorbike. Once you get used to the convenience of 25 gram threaded CO2 cartridges, you'll never want to use your portable hand pump again. Our co2 cartridges have high quality threads and a flat sealing surface that ensure a tight fit with your preferred co2 cartridges bike tire inflator. Compatible with threaded CO2 Inflators which have a 3/8”-24 TPI thread. Recyclable, single use only, and not refillable. WARNING: Contents under pressure. As these CO2 25g cartridges dispense air, they rapidly cool and become cold to the touch; care should be taken to protect your hands when dispensing air. Do not inhale or discharge toward face or body. Keep every C02 canister out of the reach of children.