Money Saver: Refill your 1lb green propane cylinders from standard 20lb propane tanks directly. A simple, effective, solution to save money and no more expensive bottles. Well-made: High-quality solid brass provides secure and sealed connection between tanks, last for a long time. Much Safer: Built in safety feature that will ensure you never over-fill your smaller tank. Well-constructed, built Heavier, Bigger, and Safer. Cuts off gas flow automatically when pressure is reached. Easy Install: No others tools required and easy to install with handheel grip for tightening. Fits all 1 lb propane grill cylinder bottles and refill easily and quickly. Perfect for camping and outdoor cooking. Warm Tip: Put your empty 1 lb cylinders in a freezer for a couple of hours, will help you refill more and faster. quantity of product:1pc color of productblack size of product:64*49mm