This boat trailer upright guide on kit comes with two Upright Galvanized guides, manufactured out of 1 1/2 inch square hot dipped galvanized steel tubing. The upright guides measure 51 inches tall with the legs measuring 25 inches long. The length of the leg allows for easy adjustments to fit your boat properly. This Kit also includes two PVC Sch. 40 poles and caps. The upright guides are designed to have the 2 PVC pole slide over top of it and rest on the guide for the correct placement. These are the heaviest duty 1 1/2" Square Galvanized guides available.