trideer exercise ball, stability yoga ball for physical therapy, active sitting, pregnancy & birth labor prep, core strength, balance training, posture improvement and daily stretching, 55/65/75cm is up for auction in Sports & Outdoors. The current bid is $2.00, 91% below the $21.59 MSRP, in New/Like New condition. Bid on this item at our Elizabethtown - Peterson Drive location before the auction closes.