Gas level indicator

Propane Butane LPG Fuel Gas Tank Level Indicator Magnetic Gauge Never run out of Gas from now on. Measure your Gas with this level indicator, simply attach it to your gas tank cylinder with this magnetic Gas Level Indicator and it will show you how much gas is left in your tank. Will actually show you when you are low on gas before it runs out Safe & accurate Reusable Comes with instruction • Instructions: 1.Place your Gas Level Indicator on a clean area on the lower half of the cylinder. 2.Turn on the gas and wait 10 minutes before you can read your Indicator. 3.In the winter the bar on the left will be active, and in the summer the bar on the right will be active.