[Quick Monitoring] Quickly check the remaining gas of your tank to avoid the inconvenience caused by insufficient gas during the filling process. [Upgraded Design] Featured with a propane ON-Off control valve, prevents gas leaks when connecting gas cylinders. You can easily control the refilling process with safe. [Easy Filling] The 90-degree elbow design makes it easier for gas to flow to the small cylinders. Simply attach to your tank and your 16oz tanks for refilling in 1 minute. [High Quality] Made of solid brass, rust-free and very durable for long time use. Leakage-free valve to assure your safety. [Application] QCC1 propane refill elbow Adapter is used for filling small propane tanks from tanks. Perfect for BBQ, camping party, heating needs and outdoor cookout., Manufacturer: Dedjgoo