The VetGun from AgriLabs is an innovative insecticide delivery system that allows you to apply topical fly control onto cattle from a safe distance of 20 to 30 feet. No chutes, no confinement, less stress. The VetGun is used with AIM-L Vet Caps to control horn flies and face flies. The VetGun system is easy to use - point, shoot and treat from foot, horseback or ATV. Ideal for treating cattle on pastures or when confinement facilities aren't available. Allows one person to do the work that would normally take several, saving the producer time, labor and money. VetGun kit includes a CO2 adapter for the 25 gm cartridge size. CO2 cartridges, additional adapters and AIM-L Caps sold separately.