The Heater Sports PowerAlley 80 Mph Lite Balls are vibrant green in color and are perfect for the most advanced ball players. While using in any lite ball or real ball pitching machine by Heater Sports, these balls simulate speeds up to 80 Mph. While measuring regulation size for baseball - 9" in diameter, these balls are 2/3 the weight of a real baseball, weighing 1.2 ounces, and allow for fast pitch speed, quick ground balls, and high fly balls. In addition to using with Heater Sports pitching machines, these balls are perfect for use with the Trend Sports Sandlot Lite Pro 4-in-1 Machine. While using this machine, these balls will simulate speeds up to 40 Mph so both rookies and veterans alike can enjoy improving their hand eye coordination and game with these advanced lite balls.These balls may rise in pitching due to the light weight feature of the ball. Be cautious of this when using at a longer distance.