Orcamp Butane Propane Gas Cartridge Replacement Tube Features : * 100% safe, full-filled fully domestically produced gas cartridge that you can use in all 7/16 screw devices available on the market.

Maximum safety with double seal system.

Can be used on all devices.

30% propane filled with 70% butane gas * It is your energy source that you can use in all kinds of weather conditions.