Our E-4 Certified Airplane Seat Belt Extender exceeds European safety standards and works on nearly all commercial aircraft flown in the EU. In addition, this Extender corresponds to the Type A Airplane Extender that fits nearly all U.S. airlines' planes (except Southwest). This Extender comes with an Owner's Card and a Velour Carrying Case. It is perfect for the plus-sized traveler who wishes to remain discreet when using an Extender or who does not want the airline to run out of Extenders. This Airplane Extender is adjustable up to 61 centimeters.