PET plastic + liquid crystal + soft magnetic Works while using the grill. Save money by consuming more from each bottle. Safe and accurate reusable. Works with (propane This product can safely and accurately check the gas capacity according to the gas temperature test and the temperature range from 10 °C to 120 °C. Actually shows you when you run out before you run out With this level indicator, simply attach it to your gas bottle with this magnetic gas level indicator and shows you how much is left in your tank Size: 10 x 6.2 cm x 0.1 cm, Manufacturer: hogtnd