The FUEL STOP is a simple tool that snaps onto a standard straw fuel gauge and prevents the gauge from ever slipping into the tank. It becomes extremely handy when it's necessary to set the gauge on the wing, as it will stay put and not roll off to disappear into the grass or onto the pavement. The FUEL STOP can be kept separately in your pilot bag to quickly snap onto a gauge that comes with a rental aircraft, or kept permanently installed in your own aircraft for regular use. The FUEL STOP is also shaped like a set of red pilot wings which makes finding the gauge in your pilot bag or aircraft seat pocket a snap. ** Product fits all FuelHawk plastic straw fuel gauges or any 1 2 inch plastic tube straw. Fuel gauge not included.**