BuTank fuel cartridge contains a high quality butane fuel designed to be used with all butane stoves and culinary torches with notched collar attachments. Produces a clean and smooth burning flame with consistent BTU output. Features a notched collar valve to ensure proper alignment with gas appliance and a countersink release vent that allows gas to release safely in the event of overpressure. The can is disposable (cannot be refilled) and is UL approved. Specifically designed to fit all Click 2 Cook table top burners. Great to use while camping, picnicking, tableside cooking, or catering.