C.E. Smith Post Guide-On with LED Lighted Posts - These Post Guide-Ons allow you to see the location of your trailer when it's under water. Equipped with long lasting, waterproof and shockproof, one piece red and amber LED lamps. The LED lamps make it easy to see your trailer's position when backing down the ramp and dramatically increase your trailer's visibility over the road at night. Amber light faces front, red faces rear. Features: Pre-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). Mounting hardware and wiring included. Sold in pairs Adjusts out to 19in each Side Fits Frames up to 3in x 4-1/4in 1-1/2in square, 16 gauge pre-galvanized steel uprights 39in high 2-3/8in diameter white PVC posts. Made in the USA