"A more sustainable fuel option for high performance Primus backpacking stoves (not included), the Primus SIP Power Gas Fuel Canister delivers eco-friendly cooking heat you can count on. A propane/butane mix that performs in the majority of outdoor cooking conditions, this gas uses biogas made from food waste to reduce its CO2 footprint and lessen its environmental impact. 230g canister weighs 13.7 oz. and measures 4.2""W x 3.3""H. 450g canister weighs 22.7 oz. and measures 4.2""W x 5.4""H.Manufacturer model #: P-220281. Eco-friendly fuel for Primus backpacking stoves (not included) Reliable propane/butane mix made with biogas made from food waste Reduced CO2 footprint and environmental impact"