CE Smith Post Guide-Ons W/ Unlighted PostsCE Smith boat trailer guide-ons with unlighted posts allow you to see the location of your trailer while underwater. When backing down the ramp the 2" PVC tubes make it easy to see your trailers position. Features: Mounting hardware included; Sold in pairs; Adjusts out to 19" each side; Fits frames up to 3 W x 5-1/4" H; 1-1/2" square, 16 gauge pre-galvanized steel uprights; 60" high; 2-3/8" diameter white PVC posts; Pre-galvanized Steel - stamped from a sheet of steel after it has already been galvanized. ; The galvanized coating is very thin (0.45 oz. on each side);