Features: * Propane Lp Filling Adapter/Adapter Connector for Gas Cylinders Adapter for Bottle Warmers QCC1 * Main Material: High Quality Brass * This product is a gas conversion adapter, it is suitable for North America gas cylinders for transferring liquefied petroleum gas from large gas tanks to small gas tanks, so that it can be used for BBQ or camping * External thread is 7/8-14 teeth Unf left thread, Internal thread is 1 inch-20 teeth thin thread * Thread adopts American thread standard, suitable for American, Canadian gas cylinders, or some new zealand Australia gas cylinders * QCC1 regulating valve. * Built-in safety feature that will ensure you never fill a smaller tank * Safest and easy to fill in seconds with no tools required * This adapter will allow you to use a small 1 LB propane cylinder with a standard grill. * Great for tailors, caterers, RVs, and anyone who cooks on the grill/has cookouts Directions for use: 1. Place empty 1 lb cylinders in the freezer for a few hours. 2. Attach the coupler to the propane tank (5-40 lbs tank). 3. Attach a 1 lb tank (fresh from the freezer) to the adapter. 4. Lift your large tank and turn it upside down and place it securely on the corner of the picnic table. 5. Open the propane valve and turn it off when the liquid propane flow stops. 6. Turn everything on the right side and remove the 1 lb cylinder. 7. Repeat as needed