Description: Never run out of Gas from now on. Now you can measure Gas with this level indicator. You just simply need to attach it to your gas tank cylinder with this magnetic Gas Level Indicator and it will display you how much gas is left in your tank. Features: It shows when you are low on gas before you run out! Efficiently works while you are using the BBQ Save money by using more gas from each cylinder Safe and accurate measurement. Reusable Works on butane cylinders & LPG (propane) Magnetic backing allows for easy reuse on exchange bottles Comes with instruction Instructions: Place Gas Level Indicator on a spotless area on the lower half of the cylinder. Turn the gas on and wait for 10 minutes before you can read your Indicator. In the winter the bar on the left will be active, and in the summer the bar on the right will be active. Specifications: Size: 9.8 x 6.2 x 0.1cm Color: Black Package Includes: 2 x Magnetic Gas Level Indicator NEVER RUN OUT OF PROPANE GAS AGAIN! Magnetic gas level indicator has a color scale which changes with gas level. Easily removable, magnetic backing allows you to reuse again and again for years to come. Works year round in all weather conditions. THESE REALLY WORK! Simply slap on to the lowest part of any propane or butane gas tank, turn the grill or accessory on, wait 5-10 mins and check the level of your tank. EVERY PROPANE TANK NEEDS ONE OF THESE! Sticks to all gas tanks. Place on the bottom half of any Propane or Butane tank. Great for RV'ing, Camping, Boating, Hiking. Can be used with BBQ grills, gas lights, stoves, etc. EASY TO USE! Simply place your Gas Level Indicator on a clean area on the lower half of the cylinder. Turn on the gas and wait 5-10 minutes before you can read your Indicator..In the winter the bar on the left will be active, and in the summer the bar on the right will be active. CUSTOMER SATISFACTION GUARANTEED! Comes with us 7 year warranty for FREE! Your satisfaction is 100% guaranteed! please be free to contact us if you are not satisfied for any reason