Used tennis balls Total 30 Tecnifibre NFX 26 balls Tecnifibre COURT 4 balls Used for 2 hours twice a week on omni courts for 12 weeks. The felt is worn, but there is little air loss, so the feel of the ball is good. They can still be used sufficiently for ball feeding, serves, etc. Many of the balls can also be used without problems for stroke rallies. ★The 4 Tecnifibre COURT balls at the bottom were used exclusively for games, so they are less damaged. These are used balls, so please only purchase if you understand this.