The Silver 1 55cm Blue Balance Ball by New Balance is a versatile fitness tool perfect for gym and training activities. With a diameter of 55cm (5’5” and under), this blue exercise ball provides stability and support for various workouts. It comes with a pump for easy inflation, making it convenient to use for balance and core exercises. Perfect for fitness enthusiasts looking to improve their stability, strength, and flexibility, this balance ball is a valuable addition to any fitness routine.