For installation with Composite & Aluminium Power Tower.Angles your radar down 4 below horizontal and provides a level horizon for your radar when the boat is bows up underway.FeaturesFits under the base of your Power TowerPre-fitted watertight base sealAll mounting holes pre-drilled for a quick and easy installationMaterials: Marine grade polymer in white, UV stabilizedContents1 x 4 Base Wedge1 x Base seal