Features 1. Upgraded QCC1 propane refill elbow adapter with pressure gauge adapter: This upgraded 90 degree design propane refill elbow adapter comes with a 1/4 "ON/OFF control valve and 1" x 20 internal thread disposable cylinder thread, making it easy to connect large cylinders to 1LB propane tanks without any tools. Upgraded fuel tank pressure gauge level indicator adapter, with 3 different colored dial gauges that can light up in the dark, allowing you to read and monitor gas levels without having to disassemble the fuel tank. An additional 1-pound propane bottle cap. 2. materials: Propane QCC1/Type1 elbow filling adapter, propane tank pressure gauge and 1lb bottle cap are made of 100% solid brass, ensuring safety, durability, no leakage, and long service life. Red ball valve switch, easy to control with fingers, suitable distance, does not affect installation space. Built in overcurrent protection device safety function ensures that your small water tank will never overflow. 3. This product is a QCC1 propane filling elbow adapter, equipped with a rotatable three color luminous dial gauge adapter and a gas switch control switch valve function. By directly connecting 5-40LBs propane tanks through Qcc1/1 type connectors, 1LB bottles can be refilled. You can use this adapter to easily refill 1-pound bottles on tanks weighing 5 pounds or more. Suitable for heaters, camping stoves, portable, desktop grills, etc. Meet your needs for camping, barbecuing, camping, heating, and outdoor picnicking. 4. Easy to install and use suggestion: This 1LB propane filling tank regulator adapter is easy to install quickly. Connect the QCC1/Type1 coupler to the large propane tank steel cylinder and the other end to the 1LB propane tank. Turn the large propane tank upside down and place it in a safe corner, away from flames and sparks, so that the liquid can flow out. You can easily monitor fuel levels and gauges at different locations. When you don't need to replenish water, you can also turn off the water replenishment valve. Kind Reminder Due to the high flammability of gases, they can only be used outdoors and kept away from flames and sparks. For safety reasons, please ensure that the valve is closed before refueling. 3. Place an empty 1-pound gas cylinder in the refrigerator and freeze it for several hours to quickly refill it. How to determine if the propane tank is full? 1. You can weigh the camping propane bottle again after the bottle is empty and full, and when the weight increases by about 1 pound, the camping propane bottle is full. When inflating, you will hear the sound of gas flowing. After being filled, the sound will disappear and become quiet. It will take about 1 minute. How to install: 1. Place an empty 1-pound gas cylinder in the refrigerator and freeze for several hours. 2. Invert the 5-40 pound propane tank and connect QCC1 to the propane tank. Close the 1/4 inch switch control valve. 3. Install a 1-inch x 20 internal thread removable steel cylinder thread onto a 1-pound can steel cylinder. 4. Open the 5-40 propane tank cylinder valve, and then open the 1/4 inch switch control valve. 5. When propane gas stops flowing, please close the 1/4 inch opening. Specification Material: Copper Size: 16 x 6 x 6 cm Weight: 270 g Package Include: 1x Propane Refill Adapter