Material: plastic Diameter: 2m Package: 9pcs circle pipes 9pcs connectors 2pcs support base (optional) How to assemble First, install both grey T-type connectors (quantity is 2) onto the base. Second, put a pipe connecting those 2 connectors, after that, connect all pipes end to end into a long straight one( like a train) Third, bend the long pipe into a huge circle. Notice: water can be used to be ballast, u can inject water into the base before assembling the the circle or after.