Scanstrut PT3010 4° Base Wedge f/Composite & Aluminum Mounts SHIPPING INCLUDED TO LOWER 48 STATE DESTINATIONS Benefits Designed to provide a level horizon for your radar when your boat is bows up and on the plane, maximizing the performance of your antenna. Simple to install and supplied with our excellent pre-fitted watertight base seal, our base wedges can be stacked on top of one another to compensate for greater trim angles. Part numbers PT3010 - Made from marine grade polymer. Fits below all Composite and Aluminium PowerTower bases