DYNAPRO Exercise Ball - 2,000 lbs Stability Ball - Professional Grade &ndash; Anti Burst Exercise Equipment for Home, Balance, Gym, Core Strength, Yoga, Fitness, Desk Chairs INFLATES QUICKLY AND EASILY WITH HANDY PUMP TO JUMPSTART YOUR FITNESS WORKOUT ROUTINE: Get a quick start on optimizing your health -- every box we ship contains an Exercise Ball that inflates using the hand pump that goes with it. Within minutes, you can use it as a stability ball in any kind of fitness training such as yoga or Pilates, or as a desk chair to correct your posture and support your back when you work. HEAVY DUTY ANTI-BURST RATING CAN MATCH ANY HEAVYWEIGHT: Our Exercise Ball is manufactured using gym quality standards. When used properly, it can carry the stress of heavy loads up to 2000 lbs without popping to prevent you from being injured. Excess loads above this weight will cause the ball to deflate slowly to ensure your safety. THICK PVC CASING PROVIDES OPTIMUM PUNCTURE RESISTANCE: Packed with non-toxic PVC material, our stability balls have a thickness of 1,877 micrometers which delivers a greater degree of resistance to sharp objects on the floor or on your clothing that may come in contact with the ball. NON-SLIP RIBBED BODY STAYS PUT WITH SKIN CONTACT: The PVC body has a matte surface with horizontal ribs contoured all around it -- making it easy to hold without slipping while tossing, bouncing or squeezing the ball even with profuse sweat. FOUR SIZE OPTIONS FOR YOUR COMFORT AND SAFETY: 45cm, 55cm, 65cm, 75cm Not sure which is the right size for you? Our size guide helps you determine which size Exercise Ball best matches your intended use based on your body height if used for exercise, and the desk height if used as a chair.