This Fun Center Design # 1 Play System by PlayDesigns has 3-inch square posts made of durable steel. This playing structure is designed with an optional roof. This playing equipment is available in varieties of color combinations of your choice. This is a play system offering fun and enjoyment to kids. This play system is made of affordable and durable material. It is perfect for outdoor use and is a great addition to a playground. The roof protects the children from rain and harmful sunrays. Multiple children can play in it at one time. Buy this Fun Center Design # 1 Play System and have fun!