QCC1/Type1 is connected to all 20 - to 40-pound propane tanks Monitor fuel levels without removing the tank. The color-coded color range allows you to see at a glance whether you want to add gas or not With leak detection function, if the leak is detected, the instrument will limit the flow to protect your safety Durable quality materials provide safe, gas-tight connections to propane tanks With dust cover. No tools required, easy to install, easy to clamp by hand. Coming with dust cover. No tools required and easy to install with handheel grip for tightening. Great for using gas grill, heater, smoker, camp stove, lantern, tabletop grill, fire pit table, turkey fryer and more propane appliances. Propane Tank Gauge 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. Easy to Attach 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. Solid Brass Withstands Weather, Scratching, Denting and Corroding Color Coded Dial for Easy Viewing 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