Franklin Sports MLB 2-In-1 Batting Tee and Pop-Up Training System Quickly changes between the spring swing batting tee and pop-up trainer Spring Swing Pro Batting Tee; single position tee, spring-loaded system absorbs bat impact and returns post to upright position, infinite height system adjusts from 22" to 36" Pop-Up Trainier; pop-up focuses training on making good ball contact and improving hand-eye coordination, delayed release allows hitter to get in position and ready to swing Uses regulation-sized 9" baseballs-2 included Includes high-quality rubber home plate and batting tips