8 Gram CO2 Cylinders are only compatible with the Byrna SD / EP & HD Models. *Not compatible with Byrna LE, SDXL, HDXL or Launchers with Byrna Boost Installed Our box of ten 8g CO2 cylinders are custom fit for the Byrna SD, EP and HD Launchers. Now including 1 CO2 cylinder with oil for simple maintenance every 10 CO2 cylinders used. It is recommended to keep an unpunctured cylinder in your launcher at all times for self-defense purposes. Punctured cylinders within your Byrna Launcher will leak over time.
