Easy to use: The magnetic design ensures a quick and secure attachment to the propane tank, and installation and removal are also easy. Reusable and durable: This gas level indicator is made of high-quality materials and is durable. Accurate measurement: The indicator provides precise readings of propane tank fuel levels, helping you avoid unexpected power outages or over-fueling. Wide Application: This propane tank gauge is suitable for indoor and outdoor use, home kitchens, outdoor barbecues, camping trips, etc. Improve Safety: Ensure safe and efficient operation by accurately monitoring the fuel level of the propane tank, reducing the risk of accidents or equipment damage. There may be slight color difference or difference in the actual product Colour:As Shown Material:PET Package Contents: 10x Gas Test Card Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.