Amazon Basics 9-Inch Mini Pilates Ball, Anti-Burst Exercise Ball for Yoga, Core Training

Customers find the exercise ball to be of good quality, perfect size, and easy to inflate with the included pump, making it suitable for physical therapy exercises. They appreciate its durability and consider it good value for money. The air retention receives mixed feedback - while some say it retains air wonderfully, others report issues with the inflator hole leaking air quickly.