Sports Power Alley 80 MPH (Sandlot 40 MPH) Soft Green Foam Balls - 1 Dozen, Lightweight, Accurate, and Long-Lasting, | Ideal for Batting and Fielding Practice for All Ages - HSG29. Compatible with Heater Lite & Real Baseball Machines: Specifically engineered for seamless use with Heater Lite Baseball Machines, Real Baseball Machines, & the Sandlot 4-in-1 Pitching Machine - ensuring consistent performance.