Designed with a two-piece mounting bracket for I-beam frames, this boat guide is great for use on cradle boat lifts and I-beam trailers. 75" height provides better visibility. Galvanized post extends 36" into each heavy-duty 2" PVC tube for extra stability. Extends out to 19" on each side. Comes with mounting hardware for up to a 4" wide I-beam frame. Can be mounted under or on top of frame. Sold in pairs.