Category : Sports/OutdoorsZ-Ball Reflex-Training Ball for Tennis Training from Oncourt OffcourtPrice: USD10.95 Challenge: I want a training aid to help my students’ speed of their reflexes and reaction times. Solution: Our patented Z-Ball speeds up reflexes! The 7-knob design creates unpredictable bounces for athletes with beginning through intermediate skills. Use the blue/yellow ball on gym floors, and the red/yellow ball on darker surfaces. Ideal for beginning to intermediate athletes ages 7 to 13. Not tennis specific. Z-Ball Reflex-Training Ball for Tennis Training from Oncourt OffcourtOther products from Oncourt Offcourt, Ltd.-Leading Tennis Equipment |