Makes it easy to clean and maintain your CO2 gun. The new ASG lubrication cartridges can be used on all CO2 compressed air guns that use a 12 g CO2 cartridge. In addition to CO2 gas, the cartridges are also filled with 0.8 g of silicone oil that cleans and lubricates the valve during firing, and at the same time provides all the moving parts of the gun with a layer of oil that reduces friction and wear. resulting in smooth action, consistent precision and longer life of all parties. Some additional benefits of the lubrication cartridges are improved performance. When in use, they offer a slight increase in velocity at the muzzle, but more importantly, a more constant pellet velocity, resulting in improved accuracy. Improved performance is also evident when used in colder climates, where it continues to deliver consistent and reliable performance, even in conditions where normal cartridges cause the gun to freeze. It is recommended to use a lubrication cartridge every ten times to replace the CO2 cartridge for cleaning and maintenance. But the cartridges can be used all the time in case of need.