Features: Gas measure gauge and it will show you how much gas is left in your bottle. Always stay prepared with accurate gas measure monitoring. Measure your gas with this measure gauge, simply attach it to your gas for bottle cylinder with this magnetic. Safe & accurate reusable works on Gas bottle. Magnetic backing allows for easy repositioning on exchange bottles. This product can safely and accurately measure the gas capacity, according to the gas temperature test, measuring the temperature span of -10 C~120 C. Will indicate when gas levels run low, before depleting the supply! While using the BBQ, save money by utilizing more gas from each cylinder. Specifications: Component: Plastic Color: Black Package Weight: approx.30g Size: approx.6.3x10cm/2.48x3.93in Package Includes: 2Pc x Magnetic Gas measure gauge note: 1.Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid.