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Make sure this fits by entering your model number. PROFESSIONAL QUALITY - OPTP has been a trusted leader in physical therapy, wellness and fitness products for over 40 years. This professional quality exercise ball is rated to support up to 220 pounds. 12 INCH DIAMETER - The Soft Movement Ball's unique larger size is great for those who find thecommon 9” ball too challenging, and it provides versatile support during exercises that target hard-to-reach muscle groups such as the abdominals, psoas, hips, glutes, quads, and hamstrings. VERSATILE - Inflation can be increased for additional firmness and instability to create a more challenging workout. SOFT & COMFORTABLE - The Soft Movement Ball features an easy-grip texture and assists with body positioning during stretching and stability moves that challenge core strength and balance. Pump sold separately. OPTP Soft Movement Ball 12 Inch Exercise Ball for Pilates Yoga Core Stability and Physical Therapy LE9401 - BDNX3RJ31