i have been using my spri stability ball for 6 years.it is so much better than any i have used in health clubs- much sturdier, does not lose inflation...its versatilty is phenominal.it serves as a bench for free weights, is superb for ab work, and is a comfortable and ergonomically correcct chair at my desk. over the years it has been deflated and re-inflated dozens of times easily with the [included] pump. several times i misplaced the plug, and the spri company cheerfully and quickly sent me [free] replacements.. a definite5 star product!.Product Description
This heavy-duty ball features tough, dura-wall construction and offers true slow deflate up to 350 LBS., making it the ideal ball for weight training applications. 55cm is recommended for for heights ranging from 5' 0 to 5' 7"
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