Brass material and durability: The propane refill adapter is made of brass, offering an attractive appearance with anticorrosion and antirust properties. It remains stable and resistant in harsh environments such as humidity and salt spray, supporting longterm use without corrosion. Secure, leakproof connection: The propane bottle connector uses a strict standard thread design to ensure a tight fit with the propane cylinder, effectively preventing gas leaks and enhancing safety during outdoor activities. American Standard compatibility: The specially designed American standard adapter is widely compatible with international standard gas cylinders in the United States, Canada, and Australia, enabling easy transfer from larger to smaller gas tanks. It meets diverse needs for camping, barbecuing, and heating across different regions and scenarios. Costeffective refilling: The gas cylinder tank coupler allows refilling a 1 lb propane bottle directly from a standard 20 lb propane tank, eliminating the need to frequently expensive 1 lb bottles and reducing overall costs. Use scenarios: Camping trips: Refill 1 lb bottles for portable stoves and compact camping equipment from a larger 20 lb tank. Outdoor cooking: Support backyard barbecues or tailgating with a reliable transfer between tank sizes. Remote or emergency heating/cooking: Use mixed cylinder sizes with confidence, ensuring continuous supply in camping or remote locations.