Harbor Mate telescoping boat cover support pole is designed to prop up a boat cover during off-season storage to reduce water and debris buildup, making it much easier to remove the cover when boating season returns. Each cover pole adjusts from 28" to 48" high and twists to lock in place. For added cover tension support, a 4. 875"D mushroom shaped cap is included, which snaps directly to the cover support pole once the snap screw attachment is removed. The foot includes a rubber cap designed not to scratch the boat hull during storage. Made with Light-weight, durable aluminum construction built to last. 28-48" Telescoping Aluminum Boat Cover Support Pole * Props up a boat cover to reduce debris and water build-up * Telescopes from 28" to 48" and twists to lock in position * Includes a mushroom cap to distribute cover tension evenly * Rubber foot will not scratch or damage boat hull * Lightweight durable aluminum construction built to last