Our boat trailer guide-on is designed of heavy-duty steel, thus, it can not be easily rusted or bent, and also, it will not be affected by saltwater. All necessary mounting hardware is included in the package, and we provide two PVC tubes with end caps to keep the boat away from scratches. Enjoy a day out on your boat without having to worry about whether your boat is protected. | Vevor | | Boat Trailer Guide-on, 60",2PCS Steel Trailer Post Guide ons,with PVC Tube Covers, Complete Mounting Accessories | White | Best Buy