Outdoor Camping Gas Butane Cylinder Tank Refill Connector Adapter Valve Designed to recharge refillable butane cylinders Convenient and portable for outdoor use Suitable for standard butane gas canisters Inflation Steps and Precautions (Note: Operation can be dangerous. Always operate in a well-ventilated outdoor area and follow safety guidelines): 1. Attach the empty cassette gas tank to the refill valve. 2. Ensure the refill valve switch is securely closed. 3. Place the standard butane cylinder on a stable surface with a height difference of more than 20 cm (ensure the cylinder valve is closed). 4. Connect the refill valve with the cassette gas tank to the cylinder. 5. Once stable, open the cylinder valve, then open the refill valve to begin filling. (Control filling time; do not overfill. Recommended fill weight for cassette gas cylinders is within 180 grams. Periodically remove and weigh the tank to check fill level.) 6. After filling, first close the cylinder valve, then close the refill valve, and carefully disconnect the refill valve and cassette tank. Color: Gold Material: Copper and zinc-plated iron Size: Approximately 11.5 x 11 cm Package Contents: 1 x Refill Adapter Note: Light and display settings may cause slight color variation between the image and actual item. Measurement may vary by +/- 1-3 cm.