One of the best cover support systems on the market. Easily adjustable boat cover support keeps water from accumulating in center of cover. Extends the life of cover by as much as 50%.Telescoping center pole (28" to 48"), polyweb straps, and bow spreader form a double ridge line under the cover. Pole rests on a rubber foot and the web straps attach to the stern with non-marring hooks. Aluminum pole: 1" diameter Polyweb straps: 1" wide, black