The swing seat is composed of EVA plastic that is soft and sturdy enough to make you feel comfortable. Moreover, it is not easy to deform or squeeze out. It is of chemical resistance, corrosion resistance and crack resistance. The size of U-shape of the swing seat is 66.5*14 cm. You will find more fun and feel safe when sitting on the swing seat.The size of each string is 130-200cm long.So the swing set can be more secure and steady. Plus, this type of stainless steel can be used for two or three years .Our swing seat can carry as much load as they can and thus, reaching up to 200kg. The swing set is designed to be non-slip. Besides, it is easy to clean and it is suitable for both boys and girls.This whole swing set comes with strings, swing seat board. Swing frame is not included.