This Westland Vented Support Pole serves dual purpose. It not only supports your cover to keep water from pooling outside, but also provides ventilation to prevent moisture and mildew from forming on the inside. "Sandwich" the cover between the two disc pieces to secure the vent and then attach the pole underneath and adjust the height. This is a specially-priced product for purchase with a boat cover only.
Details
Supports cover to prevent water pooling
Adjustable from 30" to 57"
Sturdy and lightweight aluminum construction
Built-in vent system
Installation requires a hole to be cut in your cover