Propane Tank Gauge<br> Great for using gas grill, heaters, smoker, RV ,camp stoves and more propane gas tank cylinder appliances.And no more unnecessary trips for refills when there was still some left in the tank.<br> Easy to Attach<br>It fits all brands and models with a QCC1 Type1 connection and 20 lb to a 40 lb.propane bottle. This propane tank gas gauge can be worked with propane tank cylinders, propane hose and propane adapter. Great for using gas grill, heaters, smoker, camp stoves, lanterns, tabletop grills, fire pit tables, turkey fryers and more propane gas tank cylinder appliances. <br>Solid Brass Withstands Weather, Scratching, Denting and Corroding<br>Color Coded Dial for Easy Viewing <br>How does gas pressure gauge show a leak? If you close the tank and pressure decreases over time (taking temperature into account), the needle will slowly drop to red and you may have a leak