Cyclingdeal Threaded CO2 Cartridges Refills for Bike Bicycle Pump Inflator, 30 x 16g Go to amazon.com Related posts Top 6 best co2 cartridges bike: Which is the best one in 2022? Feature30 pcs per packCo2 inflation pump 16G threaded cartridgeInflates to 120Psi (Std 700x 23C) Description30 pcs per pack, Co2 inflation pump 16g threaded cartridges, inflates to 120Psi (std 700X 23C), best value on the market.