Tools: Get a magnetic gas level indicator. Dimensions: 10 x 6.2 x 0.1cm / 3.94 x 2.44 x 0.04". Simple to use: Never run out of gas by measuring the capacity of your tank. Simply attach to your gas cylinder. Reusable: Use again and again! Options: Choose either one or two indicators. | Magnetic Gas Level Indicator | Wowcher