"Don’t be caught without spare fuel! Be sure to stock up on extra Olympia 8oz Butane Canisters for your next camping adventure. With the notched collar on top of the cylinder, changing out your fuel is quick and easy. Perfect for use in portable stoves, gardening torches, butane powered lanterns and more. For use with portable appliances that use 8 fluid ounces butane cartridges. Designed to run for between 2 and 8 hours depending on the style of appliance being used. Please dispose of according to local laws and regulations. Olympia 8oz Butane Canister for Portable Appliances & Stoves"