Roller Style Boat Guide-OnThese smooth rolling guides assist in centering the boat onto the trailer. Ideal for retrieving your boat on shallow ramps where the trailer is not far into the water when you are alone or have a crosswind or current pushing the boat.Features:21"H Galvanized posts extend up to 13" out from edge of trailer frameMounting hardware included for frames up to 3"W x 4 1/4"H Sold in pairsWARNING: This product can expose you to chemicals including LEAD,Chromium (hexavalent compounds) which are known to the State of California to cause cancer, birth defects or other reproductive harm, and NICKEL (METALLIC),COBALT METAL POWDER,BERYLLIUM which are known to the State of California to cause cancer, and ARSENIC ,CADMIUM which are known to the State of California to cause cancer or other reproductive harm. For more information go to P65Warnings.ca.gov.