SKLZ Sport Performance Trainer Ball - Self-Guided Stability Ball (65cm) (Pump Not Included) 12 Essential exercises printed on the ball Focuses on core stabilizers, flexibility and efficient muscle regeneration Long-lasting and durable; anti-burst technology up to 1,000 lbs. Maximize strength and regeneration in any routine with the stability balls' detailed exercises 65 cm recommended for heights 6'2" and below