Description de chez Amazon USA : - Material:Iron - Features rubber end caps and a non-slip rubber pad for excellent stability,sturdy construction with fine workmanship. - Height adjustable - Sturdy and Durable - This Footstool provides you with a healthier sitting posture! Adjust it to your physiological attributes and enjoy a painless and effortless playing experience! - Easy to set up, folds flat for convenient storage or transport. Comes with a lifetime warranty.