Universal Fuelhawk Fuel Gauge 16

The Fuelhawk is clear lightweight and unbreakable. It's easy to use and gives an instant readout in gallons usable. No more guessing. These handy devices offer the answers to these very important questions:

• How many gallons of usable fuel are still in
  the tank?
  
• How much fuel can be added without going
  over gross weight?
  
• Are the aircraft fuel gauges working and
  accurate?

(PDF)

Dimensions: .5X.5X16