Train fitness and reflexes with the boxing speed ball with stand If you want comprehensive boxing training, then take a whack at the boxing speed ball with stand. The versatile sport equipment from Gymrex trains the arm muscles, fitness and timing in equal measure. You can easily set up the boxing equipment in a studio or in your own home and get started. Intensive—trains the arm muscles and hand-eye coordination Height-adjustable—speed ball can be set to an optimal height between 125 and 160 cm Durable—mix of different materials allows for high load Stable—large base measuring 48 cm in diameter is filled with sand Accurate—speed ball with a diameter of 18 cm