PVC guides your boat on safely and gives you visual aid when backing up your empty trailer. Bright orange end caps on these PVC guides with a 17 degree angle give you a brighter and wider target when loading your boat. The non-marking PVC pipe is braced inside with metal tubing going 15" up into the tube, adding strength and impact resistance. U-bolts and nuts are zinc plated. Mounting hardware is galvanized for corrosion protection.