What is the fine-grained topic of the following text: The new Ghost X -13.5 Tee Ball bat meets the new USA 2018 USA Bat Standard and is APPROVED FOR PLAY IN AABC BASEBALL, BABE RUTH & CAL RIPKEN, DIXIE BASEBALL, LITTLE LEAGUE BASEBALL® AND PONY BASEBALL. Only return the topic.
Ghost X -13.5 Tee Ball bat approval for various baseball leagues