75″ Post Guide-onThese extra tall Post Guide-Ons allow you to see the location of your trailer when it’s under water. Designed for I-beam trailers and I-beam boat lifts, these guide-ons feature an innovative two-piece mounting clamp that works above or below the I-beam. Fits on I-beams up to 4″ wide with provided hardware. Features: Mounting hardware included Sold in pairs Adjusts out to 19″ on each side Fits frames up to 3″W x 5-1/4″ H 1-1/2″ square, 16 gauge pre-galvanized steel uprights, 36″ high 2-3/8″ diameter white PVC postsWARNING: This product can expose you to chemicals including ARSENIC ,CADMIUM which are known to the State of California to cause cancer or other reproductive harm, and BERYLLIUM,COBALT METAL POWDER,NICKEL (METALLIC) which are known to the State of California to cause cancer, and Chromium (hexavalent compounds),LEAD which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Quick Guide (pdf)