1. Safe and Outdoor Operation: This propane bottle refill adapter should be used in a well-ventilated outdoor area. Prioritize safety by ensuring that the empty propane tank is securely attached to the inflation valve, and confirm that the valve switch is tightly closed. Place the full-size steel propane tank (meeting national standards) on a stable surface, with the tank's switch properly closed. 2. Easy-to-Follow Usage Steps: The portable propane tank adapter is designed for user convenience. Simply attach the inflation valve with the filled propane tank, then place the small propane tank on a lower and stable surface. First, open the switch on the large propane tank, and then open the switch on the inflation valve to start refilling. Control the filling time and avoid overfilling (recommended within 400g). After a while, remove the tank and weigh it to proper filling. 3. Efficient and Cost-effective: With this gas cylinder regulator valve, you can easily refill your small propane tanks from a larger one, saving you money on purchasing new tanks. No need to worry about running out of propane during camping trips or outdoor cooking sessions. Enjoy uninterrupted use of your gas stove with a replenished supply of propane. 4. Versatile Compatibility: This refill output converter adapter is compatible with a of gas stoves and appliances that use small propane tanks. It offers a convenient solution for refilling tanks used in camping, grilling, tailgating, and other outdoor activities. a continuous and reliable fuel source wherever you go. 5. Durable and Reliable Design: Built with high quality materials, this gas stove connector is durable and long-lasting. It provides a secure connection between the propane tanks, preventing leaks and ensuring a safe refilling process. Enjoy peace of mind knowing that your propane refill adapteris built to withstand repeated use. Net weight:78g Suitable for:Australia, UK, USA, Canada and other countries. Please note:There is a slight color difference or difference in kind, it does not affect the use, please do not mind, thank you! Colour:Silver Material:Aluminum alloy Size:70x45x45mm/2.76x1.8x1.8inch Package Contents: 1 * Propane Bottle Refill Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.