Antwalking Gym Rings With Buckle Pull Ups Door Bar Fitness Chin Up Workout for kids Ring Made of solid (not hollow) PP Plastic and adjustable high density polypropylene webbing Comfortable teardrop shape specifically sized for a child's grip webbing size:110cm(Length)2.5cm(Wide)/43.3"(L)0.98"(W)(can hold up to 200kg) Max Ring Diameter:13.5cm(5.3") Door Bar Length: 60cm-100cm(extension)