The Uwin Stage 1 Green Tennis balls come in a bucket of 72 balls. They have been designed to help develop the skills of young and upcoming players.
These stage 1 balls are pressureless which makes them 25% slower than a standard tennis ball, which allows the player to get in to the correct position and focus on the shot technique.
The stage 1 balls have been developed for players moving from a small court to a full sized court. Colour coded green as specified by the ITF.