robust exercise balls A sturdy gym ball offers full body exercise Extremely thick walls undergo durability testing Trade name: Heavy Duty Gymball Yoga Ball Anti Burst 65 cm & 75 cm Weight: 1350 grams for 75 cm, 1200 grams for 65 cm Color: Blue, Silver, Purple; Material: PVC Measurements: 65cm / 1200g / 75cm / 1350g Aim for athletic fitness