Multi Functional Adapter: This Butane/Isobutane Adapter Allows You To Refuel From Portable Camping Stoves To Outdoor Heaters. The Cylinder Filling Adapter Is Made Of Ultra Hard Aluminum Alloy, Brass, And Rubber, With Corrosion Resistance And Durability. | | Convenient Design: Equipped With An Exhaust Pressure Button For Easy And Controlled Refilling Of Fuel Tanks. | | Convenience: It Can Refill The Gas From The Isobutane Tank (Lindal Valve Tank, En 417 Connection) To Another Isobutane Tank/It Can Refill The Isobutane Tank With Gas From The Butane Fuel Tank (Nozzle Bottle, Cylindrical Gas Container) | | Durable Construction: Crafted To Withstand The Demands Of Outdoor Adventures, Ensuring Long-Lasting Performance. | | Equipped With A Butane Tank Adapter: It Provides Nozzle Input And En417 Lindal Valve Output, Allowing You To Replace The Butane Fuel Tank With An Isobutane Tank (Lindal Valve Tank, En 417 Connection), So You Can Use An Inexpensive Butane Tank For Camping Stoves.