The C.E. Smith Extended Post Guide-Ons are a great way to add and improve visibility when loading and unloading your boat. The Extended Post Guide-Ons pair nicely with CE Smith Bunk Board Guide-Ons, coupling the centering support and the added visuals to make trailering easy.•4 Adjustable height settings 39 , 37.5 , 35.5 , and 33.5 (as measured from the top mounting bolt hole center to the top of the PVC cap) •1-1/4" pre-galvanized steel tubing•1-14/16" outer diameter white PVC tube•Works with CE Smith 2' Bunk Board Guide-Ons and the CE Smith 5' Bunk Board Guide-Ons•Can be used with other bunk board guides with 1-1/2" tubing•Includes all needed hardware to mount with existing CE Smith Bunk Board Guide-Ons•Sold in pairs•Bunk board guide-ons sold separately•Pre-galvanized steel construction Mounting hardware included for easy install Adjustable height for custom fit | CE Smith C.E. Smith Extended Post Guide-On in White