Lighted Post Style Boat Guide-OnThese 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. For trailer frames up to 3"W x 4-"H. Mounting hardware and wiring included. Sold in pairs.60" Total HeightAdjusts Out to 19" each SideFits Frames up to 3"W x 4-"H1-" sq. 16 ga Pre-Galvanized Steel post Extends 36" Into 2" PVC tube for strength Red light faces rear. Amber light faces Front2" PVC tube notched to prevent twisting.