Great bounce, 75% slower than normal tennis balls. Transitional stage 3 balls. 100% satisfaction. Pack of 3 balls. Designed for kids learning to play tennis on a 36 foot court, short court or driveway. These balls are larger and softer than standard yellow tennis balls, with a lower bounce (-75 percent), making it easier for kids to hit the ball consistently. LPT Slow bouncer Red tennis balls are conform to the USTA QuickStart Tennis format and ITF Stage 3 standards.