The Sterno 50130 8-Ounce Butane Fuel Cartridges are ideal for entertaining and catering with (12) cartridges in the entire pack. These 8-ounce fuel canisters have a 2 to 4-hour burn time and fit Sterno portable butane stoves and torches. The vent ports surrounding the inside of the canister tops are shielded from damage. The canisters are designed to expand and release gas evenly during extraordinary pressure build-up and the tops are double-seemed to protect against separation when venting. When empty, the cans must be disposed and cannot be refilled.