Three unique models to choose from! Model 222: A truly unique Trevi creation, our model 222 features the Secure-Lock system for added security, and gaurantees improved stability for your pool. This incredible new design eliminates the need for screws at ground level, which also elminates any risk of corrosion.     Model 218 and 206: The Superior quality top seat, mad of synthetic resin, features uniform callibration, UV treatment against discoloration and a molecular memory to prevent warping. In Addition, the top seat is totally resistant to corrosion and scratches. The Double Pool support post and stay assemblies are designed for superior strength as well as aesthetics. The Bottom safety track made of galvanized steel, guarantees the stability of your pool!