Provides the propellant needed to operate the VetGun system for fast and efficient treatment of cattle. Available in 25 gram and 90 gram CO2 cartridges, each cartridge delivers consistent performance for reliable application in the field. The 25 gram cartridge provides approximately 25 to 30 discharges, while the 90 gram cartridge delivers approximately 70 to 90 discharges, helping you treat more cattle with fewer cartridge changes.