- Enhances core muscle strength and development by isolating specific muscle groups
- Can be used standing sitting kneeling lying down and in tandem with exercise equipment such as balls or resistance cables
- Made of soft pliable PVC with a nibbed surface on one side
- 13 inches in diameter and 3 inches in height
- Anti-burst can withstand 500 pounds of pressure and can be re-inflated using standard bicycle pump and pump adapter
SPRI PRX-V Pumping Rubber with the Xertube Video
13 years ago
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