SAFETY IS NO.1: Safety always comes top priority. trampoline accessories such as enclosure net, padding cover, jumping mat and tubes, let you and your kids enjoy a happy time carefree HIGH QUALITY STEEL PIPES: Constructed of heavy-duty galvanized steel pipes with a wear-resistant and rust-resistant zinc layer, the frame of the outdoor trampoline is durable and not easy to fade with a long lifespan. This tube has been galvanized on both internal and external surfaces.