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AILIFE Small Exercise Ball, 9 Inch Mini Pilates Ball Mini Yoga Balls with Inflatable Straw for Yoga, Pilates, Stability, Barre, Physical Therapy, Stretching and Core Training (Blue) : Amazon.co.uk: Sports & Outdoors
Cikyner Soft Pilates Ball, Small Exercise Ball 23-25cm Mini Gym Ball with Inflatable Straw, Suitable for Pilates, Yoga, Full body Training, Physical Therapy and Balance improving at Home, Gym & Office :