This is a Fuelhawk Cessna 182 Specific fuel gauge for a 39 Gallon tank capacity. J-Air Fuelhawk fuel sticks are designed to let you visually measure fuel in the tank. Fuel exhaustion is a leading cause of general aviation accidents. Don’t let your students or customers be a victim. Know how much fuel is in the tank with a J-Air Fuelhawk Gauge. – Fuel exhaustion is one of the leading causes of general aviation accidents. Even if you don’t own your own aircraft, but routinely rent the same aircraft, having a Fuelhawk fuel gauge in your flight bag is one more measure of safety you can provide yourself and your passengers. Throw out your wooden dipsticks, and upgrade to a more accurate, reliable method of determining the fuel quantity in your tanks.