The Hitting Streak Automatic Ball Feeder works with all Baseball model Hitting Streak pitching machines. The Hitting Streak pitching machine ball feeder does not work with Softball versions of the Hitting Streak. This automatic ball feeder holds up to 12 ATEC Tuffy SFT pitching machine baseballs and rotates freely with the Hitting Streak. The sturdy nickel plated steel construction makes this a durable addition to your Hitting Streak.