Suggested Retail:$90. Bosu Sport Balance Trainer. BOSU Spot Balance Trainer is an unstable, dynamic surface to work out on that helps increase upper and lower body strength along with important core muscles. Same sturdy dome material as the BOSU Home Balance Trainer but in a compact, more portable size. Recessed handles for easy carrying, 6 non-slip feet for added safety and smaller size for easy storing. 19. 7-inch bladder/dome diameter (not including base) x 7 inch high when fully inflated. Base is approx. 22 inches. Maximum weight limit is 250 pounds. Made in the USA.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.