Let the fun begin! This U.S. Military issue inner tube is BIG and the most rugged you can buy, which makes them perfect for all kinds of outdoor recreation. Whether you are floating down a lazy river with an ice cold drink or setting a new land speed record on your favorite sledding hill, this tube is king. Use your imagination and do something fun this weekend! 14.00 x 24 Large. NSN# 2610-01-364-4097. Unused.