Boat Roller Guide Kit - PairFeatures: Boat guides help you visually guide your boat onto your trailer High-strength super gripper mounting brackets attach firmly above and below the trailer frame Easy bolt-on mounting fits trailer frames up to 3" x 5" high Adjustable to provide optimum fit to any hull design WARNING: This product can expose you to chemicals including BISPHENOL A (BPA) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.