US Air Force Afloat Prepositioned Fleet Challenge CoinMeasures Approximately: 1.75 InchesNo Special EdgingFront: US Air Force Afloat Prepositioned Fleet, IYAAYAS!Back: Delivering the enemy's destruction, Anytime AnywhereChallenge Coins are generally created for the Military and are prized by the service members that receive them. Perfect for Collectors of Militaria.