That nifty new CO2 inflator you have won't do you much good without any cartridges, so (re)supply up with the reliable, non-expiring Serfas 25g CO2 Threaded Cartridges. These 100% steel capsules are designed to fit all CO2 pumps that accept 25g threaded cartridges.
100% Recyclable Steel
25g Threaded Cartridge (x2)
Fits all CO2 pumps that accept 25g threaded cartridges.