Demonstrate your military pride with this great flag! This handsome flag is made of good quality polyester and measures 3' X 5'. It is finished with a sturdy canvas header for added durability and features two brass grommets for easy display on poles of 6 ft and larger. AmericanFlags.com is proud to support our U.S. military, both active duty and retired. United States Naval Construction Battalions, better known as the Seabees, form the Naval Construction Force (NCF) of the United States Navy. Their nickname is a pronunciation of the first initials "C.B." from the words Construction Battalion.