Each 8-oz. butane canister can run a portable stove for two hours at a high setting or four hours on a low/simmer setting. Works with any stove that accepts 8-oz. canisters (also works with other types of butane appliances). Notched collars lock cartridges into place for secure fit with Sterno portable stoves. Easily detectable odorant added for safety. Per 12. Individual can dimensions: 8"H x 2.75"-dia.