RhinoTube dock post covers provide added impact protection from protruding metal posts. They add a clean, crisp and uniform look to rough, uneven or ugly metal poles. Rhino's post covers not only provide more protection from watercraft, but also make your dock the best looking dock on the lake! Each unit includes a 3" wide x 3" deep RhinoTube, once fused-on cap and one 1-3/4" x 1/4" screw and jacknut to tighten post cover to dock post.