Product Description:1. Easy Refilling - The 90-degree elbow design facilitates smooth gas flow to smaller cylinders, allowing easy connection to large tanks and 16-ounce cans, allowing refilling to be completed in less than a minute.2. Enhanced Design - Equipped with a propane ON-OFF control valve, this adapter minimizes gas leakage during cylinder connection, allowing for safe and controllable refilling.3. Quick Monitoring - Quickly assess the remaining gas in your large tank to avoid any inconvenience caused by insufficient gas levels during refueling.4. Safe Structure - The propane tank refill adapter is made entirely of solid brass, which is very durable, safe, rust-free and corrosion-resistant. The solid brass material ensures excellent sealing, ensurin.