China manufacturer of bungee trampoline,large trampoline, round trampoline ,rectangle trampoline and accessoris. China manufacturer of bungee trampoline,large trampoline, round trampoline ,rectangle trampoline and accessoris.1)The frame tube made by galvanized steel (double galvanized for inside and outside);2)Jumping mat is made of super heavy-duty, fade-resistant polypropylene fabric, which is ...