HIGH QUALITY - High quality Aluminum Alloy and Copper construction makes our propane to butane adapter corrosion resistant and long lasting. It is perfect for camping, backpacking, motorhome trips or hiking, and it will be a great assistant for your travel! EFFICIENT - Easily input and output. Convert 1L small canister to EN417 Lindal valve canister. 1L small tank input and EN417 Lindal valve output, very efficient.