THERABAND Exercise Ball, Stability Ball with 55 cm Diameter for Athletes 5'1" to 5'6" Tall, Standard Fitness Ball for Posture, Balance, Yoga, Pilates, Core, & Rehab, Red : Amazon.co.uk: Sports & Outdoors
Exercise Ball 55cm Green Balance Easily Inflated Gym Ball - Sensory Toy Warehouse - Special Needs Developmental Toys
Exercise Ball 55cm Blue Balance Easily Inflated Gym Ball - Sensory Toy Warehouse - Special Needs Developmental Toys
KM-Fit gym ball 55 cm training ball with air pump sitting ball office anti-burst ball for fitness, yoga, gymnastics, core training pezziball yoga ball BPA-free blue