Attach these guides to the side of your boat trailer, and the C.E. Smith Angled PVC Post Guide-Ons will let you see the location of your trailer when it's underwater and it'll help you note your trailer's location and angle when the boat is not on your boat trailer. These post guide-ons from C.E. Smith stand 40" above the trailer frame to be easily seen and their reflective caps allow you to see them in low-light conditions. These adjustable guide posts are angled outward to accommodate wide boat bows. Made of 2" schedule 40 PVC posts (2-3/8" actual outside dia.). Strong, pre-galvanized steel parts are made to last. Fits boat trailer frames up to 4-1/4"H and 3"W. Mounting hardware is included. Note: check with your state Department of Transportation for restrictions regarding maximum trailer width. Sold in pairs. Made in USA. Lets you see the location of your boat trailer when it's underwater Note trailer's location and angle when the boat is not on boat trailer Stands 40" above the trailer frame Reflective caps for low-light conditions Angled outward for wide bows 2" schedule 40 PVC posts Pre-galvanized steel parts Adjusts to fit most trailers