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Feature
Magnetic and Elastic : you could easily attach this indicator on metallic surface of any Gas TankThe colored indication would show the Gas Level to read easily
Instruction: 1. Place this Gas Level indicator on a clean area on the lower half of the cylinder
2. Turn on the gas and wait 10 minutes before reading the indication
3. In the winter, the left bar will be active; while in the summer , the right bar will be active.