If you own an air gun, just like a real gun, you need to maintain it to keep it performing at its maximum potential. Blowback models, in particular, have moving parts, which need to be lubricated every so often. This helps to preserve the rubber O-rings, the seals and the CO2 capsule’s piercing mechanism. The Gletcher Oil Service Cartridge offers you an easy, no-mess way to do just that. Within the 12-gram cartridge, CO2 and oil have been combined so that the air gun is being lubricated as it’s fired. Replacing a CO2 only cartridge, on occasion, with the Gletcher Service Cartridge will assure you that your air gun is always in tip-top shape!