Hongso TA002 1 LB Propane Tank Refill Adapter - Safest Tank Refill Attachment - 100% Solid Brass - A Regulator Valve Accessory That Fits All 1 lb /16.4 oz Small Cylinder Throwaway Disposable Bottle 100% Solid Brass Construction makes it Corrosion Resistant; Built Heavier, Bigger, and Safer than others Refill your 1 lb Cylinder. You'll never have to buy another tank again. Soft nose POL (rubber ring allows for proper seal); Fits all one pound tanks and Easily Refill one pound bottles; Built in safety feature that will ensure you NEVER over-fill your smaller tank. The onlyfire adapter automatically cuts off gas flow when pressure is reached. You can use it to refill 1 lbs bottles for your BBQ, camping stoves, propane heater, propane lantern,welding torch, or anything that uses propane. Refills 1 lb propane bottles in minutes. Works with 20 to 50 lbs cylinder.