The Tourna Tenn-Tube gives kids a fun and easy way to pick up and store tennis balls. Lightweight, durable tube features a rubber flange to allow balls to enter the tube without falling back out. Fence hook for storage and a removeable elastic band for secure transporting. This Tenn-Tube includes 21 stage #2 tennis balls. Stage #2 low compression balls bounce 50% slower than regular tennis balls. Ages 9-10+, 60 foot court. Tourna Stage #2 balls meet ITF and USTA Quickstart specifications.