VTX slam balls are built to absorb the energy of a slam, have no bounce and be ready for more. The ball’s center is filled with sand, so it will shift when doing slams and throwing exercises or during hand-offs for a core stabilizing workout.Specifications:The VTX slam ball is encased in a tough rubber shell that is equipped with an easy to grip surface.Diameter:10, 15, 20, 25, 30lbs – 9”40, 50lbs – 10”Thickness: 3.0mm – 3.2mmAvailable in 10, 15, 20, 25, 30, 35, 45 and 50lb sizesThe VTX slam ball will add a new dimension to your workout!