90g CO2 cylinder bulk pack 24ct Save money and keep on shootin'! This pack of 24 CO2 tanks will last you a long time, even if you shoot hundreds of shots a week. Use with air rifles, submachine guns and air pistols that accept the larger 90g CO2 tanks or have been upgraded to accept them. These 90 gram cartridges have the same external dimensions as 88 gram cartridges.