60 Post Boat Guide-On with U-Bolt Mounting Brackets & Unlighted PostsThese Post Guide-Ons allow you to see the location of your trailer when it's under water. The 2 PVC tubes make it easy to see your trailer's position when backing down the ramp.Features:Mounting hardware included Sold in pairsAdjusts out to 19 each sideFits frames up to 3 W x 4-1/4 H1-1/2 square, 16 gauge pre-galvanized steel uprights39 high 2-3/8 diameter white PVC posts.Stands 60 above the trailer frame with white post caps.Made in the USAInstallation InstructionsFor larger trailer frames check out our Large Frame U-Bolt Kit (11416)Pre-Galvanized SteelPre-galvanized steel parts are stamped from a sheet of steel after it has already been galvanized. The galvanized coating is very thin (0.45 oz. on each side)WARNING: 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.