This product can safely and accurately measure the gas capacity, according to the gas temperature test, measuring the temperature range of -10 C~ 120 C.
actually show you when you are low on gas, before you run out!
Works while you are using the BBQ
Save money by using more gas from each cylinder
Safe & accurate

Reusable
Works on LPG (propane) & butane cylinders
Magnetic backing allows for easy reuse on exchange bottles
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 be active, and in the summer the bar on the right be active.
Colour:black
Material:pet

Package Contents:
3 x Magnetic Gas Cylinder Tool