Self Sealing Type Cartridge Burn Time: Approx. 2.75 - 3 hours (can vary depending on strength of flame required) Code: C250 Camping Gas. Propane/Butane Mix. 290gm cartridge This product is classed as a dangerous goods - Additional DG freight surcharge applied by the freight companies Full carton quantity - 6 pcs Safety guidelines. Source: ASSIST website Storage of Canisters when not in use: • Total gas storage must comply with jurisdictional and local storage regulations. • Canisters must be stored in a locked, cool, dark, separate, and well-ventilated area. Never store canisters in the sun. This may require the purchase of a suitable storage cage. • Canisters must not be stored in damp areas, with or near corrosive materials, or with other flammable or combustible materials or near escape routes. • Canisters must be stored in an upright position with the valve/cap closed. • Monitor the canister for leaks after each use by checking the valve, cap, any seals and each part of the canister. Checking of leaks can be done with a soapy water mix, or looking for areas of frosting. • Consideration needs to be given to the transportation of these units from the storage area to the lab and back. • Spare cartridges should be stored away from those in use.