Take your training to the next level with Weighted TF-Trainer Basketballs by Spalding. Trainer Basketballs bounce like regular basketballs and are designed to improve arm, wrist and finger strength to extend shooting range. 29.5" size available in 3-lbs and 6-lbs. 28.5" available in 3-lbs. Sold in packages of four (4) basketballs.