This propane tank gauge is compatible with Brinkmann 812-9220-S propane tanks up to 40 lbs. It is a reliable and accurate measurement tool for your propane tank. The gauge is designed specifically for use with propane tanks and is easy to install and use. With this gauge, you can easily monitor the pressure and volume of your propane tank, ensuring that you always know how much propane you have on hand. It is a great addition to any home or business that uses propane for heating or other purposes. This Brinkmann propane tank gauge is a high-quality product that will provide you with accurate and reliable measurements for years to come.