Makes it easy to see the end of the trailer while on the road or when loading/unloading. Galvanized post extends 36" into each non-marring heavy-duty 2" PVC tube for extra strength. Extends out 19" from each side of trailer frame. Can be mounted on top of frame for extra height. Complete kit for frames up to 3" Width x 41/4" Height. Display Box for easy merchandising.