Housmile Anti-Burst Exercise Stability Ball, Yoga Ball, Perfect Ball Chair for Home or Office, Select from 55/65 / 75cm(3 Colors) More healthy - Yoga ball made with environmental friendly materials, non-toxic and more healthy. Slip resistant - Yoga ball use high quality materials and spiral slip design, doubled stable and provides an excellent slip resistant experience. Extras - The free pump / airlock / gas stubbs are included! Size option - 55 cm, 65 cm, 75cm. Exercises abs, waist, back, arms, hips, Leg, gluts and other muscles, easy to make your body healthy and strong. Yoga ball Seller 1 Year Limited Warranty: Should ball or pump be defective, please contact us directly from Amazon Buyer Central for a replacement or refund. You can contact us anytime from the date of purchase, we will try our best to provide you the best service.