medieval black yoga training ball set with massage texture, including 1 pump and 1 bag. the quality of the training ball is very good, and the p effect is very good. you must have one at home.the diameter of the ball is 55cm. the richer and more comprehensive the valuable information about products, the better, so that buyers can make more efficient judgments based on this information. description generally includes product pictures (supplemented by pictures outside the first picture area); pilates yoga ball,pilates balance ball,be fit pilates,swiss pro,gym ball 65cm,balance ball,fit home gym,lamelo ball 22,pilates at home,body sport fitness ball.syi