SFE Slam Balls 

• BUILD MUSCLE MASS & ATTAIN PERFECT BALANCE: Slam balls add a layer of resistance to exercises that traditionally rely on body weight. They naturally increase muscle mass and improve posture and balance by aiding in regulating movement patterns.
• ENGINEERED FOR PRECISION & DURABILITY: Simply the best slam balls on the market. 
• CHOOSE YOUR SIZE: Our 9" diameter balls are offered in 10-lb, 15-lb, 20-lb, 25-lb, 30-lb, 35-lb, 40-lb, 45LB, and 50-lb sizes. Get one now according to your strength level, and come back to buy more as your endurance increases!