Check the listing for details. Propane Fuel Level Indicator - Magnetic & Reusable - Gas Level Reader (Set of 2). Color: Black, Condition: New. Listed at 9.95 USD. Never Run Out of Propane Gas Again! Introducing the World’s Most Durable, All-Season, Magnetic Propane Tank Fuel Level Indicator. Has It All: Simply place the magnetic gauge on your propane tank to instantly read the fuel level with high accuracy guaranteed. Magnetic, Accurate, & Reusable: Accurately measure the level of your propane tank and be the hero of your cookout! Never again worry about running out of fuel in the middle of grilling. Reuse Again and Again: This durable gauge is built to last for years to come, working year-round in all weather conditions. Universal Fit: Sticks to all gas tanks. Effortlessly attach it to the bottom half of any Propane or Butane tank. Just turn on the grill or accessory, wait 10 minutes, and get an accurate reading that will last for years. Do These Really Work? Absolutely! Over 100,000 happy customers and counting can attest to their effectiveness. Slap the gauge on the bottom half of any propane or butane gas tank, turn on the grill or accessory, wait 5 minutes, and check the level of your tank. Where Can I Use These? Anywhere you use a propane or butane tank! Whether you're RV'ing, camping, boating, or hiking, this gauge will be your reliable companion. Use it with BBQ grills, gas lights, stoves, and more. Every Grill Needs One Of These! Ensure you never run out of propane again and enjoy worry-free cooking with this must-have propane tank fuel level indicator.