This support pole allows you to support and ventilate your cover with one product. While all of our covers are breathable, the air vent helps to further reduce mositure, heat, and mildew. Each kit comes with a telescoping anodized aluminum pole, a boat vent, and simple installation instructions. The pole can adjust from 22" to 70" in height so that you can choose the height that's needed to allow water to run off your cover. Designed for storage only.