Designed for overhead ball slams, wall slams and wall balls, the Body Solid(R) 20 lb. Slam Ball features an extra-thick, textured rubber shell built to last through tough workouts and extended use. Cardio and Core Training Non-bouncing, non-rolling ball is designed to add cardio to strength training exercises Helps to improve core strength and explosiveness by engaging your full body throughout throwing motions Durable Construction, Enhanced Grip Extra-thick rubber shell is built to last through tough workouts and extended use Textured surface ensures a proper grip during challenging exercises Additional Details Weight: 20 lbs. Manufacturer's Warranty: 30 days