Our telescoping cam lock support poles have been tested to hold up to 120 lbs. That’s more than the standard thumbscrew mooring poles. They have a polycarbonate collar and stainless steel components. The aluminum tubing is anodized, heat-treated, and lightweight. We use fully synthetic TPR rubber Grey bottom crutch tips that will not scuff or mar your boat's flooring. Boat Vent II is made its name in the marine industry over the last two decades. Molded from the highest UV inhibited plastic on the planet, it can be installed on virtually any boat cover. This pole extends to 56" and collapses to 30.5".