CO2 cartridges with silicone lubrication 12 grams each Each cartridge contains 0.80 grams of silicone oil Lubricates your CO2-powered guns and helps maintain the seals Insert and use like any other CO2 cartridge (no additional lubrication required)* * *The manufacturer recommends using these prelubed cartridges in place of at least every 10th cartridge. However, you can use them 100% of the time without concern that you're overlubing your gun.