Manufactured by Hitech & C Co. Ltd. of Korea Powerisers abide by stringent quality standards. The construction materials used for the Poweriser are of the highest quality. A genuine top quality jumping stilt available at an affordable price to the end user the Poweriser consists of a thick aluminum frame with a long lasting quality fiberglass leaf spring as the backbone. A twelve month general warranty (six months on Spring and Rod-D parts) serves as peace of mind for you our buyer that this outlay is worthwhile. An extreme exciting and interesting alternative sport ideal for good fun exercise or healthy competition. The Poweriser spring breaks down gradually with a controlled performance decrease and without any sudden dangerous breaks. Adult/Teen Powerisers allow you to jump 7 feet high and run 20 miles per hour. You must wear full safety equipment