Iwatani BUT-6 Butane Canister, Pack of 4, 8-Ounces Go to amazon.com Related posts Best iwatani butane stove FeatureUL ApprovedButane has a very long shelf lifeRim Vent Release System8 ounce Butane CanisterFor Use in Iwatani Butane Stoves and Torch DescriptionIwatani Butane Canister 8 Oz 3 Pack. For use in the 35FW and the ZA-3HP.