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- Super soft 14" diameter compact vinyl disc
- One side is smooth and the other is knobbed
- Perfect for lower back, pelvis, balance and posture exercises
- Can be inflated from 1" to 2.5" thick with a standard sport
ball needle (not included)
- Use one for each foot in standing exercises or do push-ups with one on each hand (not as easy as it sounds!)
- Colors vary
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