Easily visible Tie Down Post Guide-Ons help you load your boat safely while also providing a visual aid when backing an empty trailer. A hot-dip galvanized metal post extends 20" into the nonmarring 2" PVC pipe for added strength and impact resistance. Fit up to a 3"W x 4"H trailer frame. Side adjustment out to 13". Tie Down post guide-ons include mounting hardware. Sold in pairs.