FORTRESS CRICKET BOWLING MACHINE BALLS ? IDEAL FOR NET PRACTICE Perfectly suited to the Paceman Cricket Bowling Machines, these FORTRESS Bowling Machine Balls are ideal for players wanting match-quality practice. Available in three styles (Light, Regular or Velocity), these cricket balls have been innovatively designed to replicate the characteristics of regular cricket balls. All three styles of cricket ball feature a precisely-engineered construction which guarantees a high performance level will always been delivered