10 pack of 8g food-grade CO2 cartridges, use in uKeg 64 growlers. These are standard size push in type. (unthreaded) The other common cartridges are screw type. Some kegs can use either. Check with your keg to be sure which you need.
The uKeg uses this type.
8 oz for the uKeg 64
16 grams for the keg 128
They are not interchangeable(8 gram only fits the uKeg64 and the 16 gram only fits the uKeg128.) but may be used for other standard dispensers that accept unthreaded cartridges.
(Co2 Canisters cannot be shipped internationally)