Our whips are solid fibre glass and are tapered for maximum whip action! The base is cast aluminum. (535.2 a marine alloy) For quick and easy removal, the base is made in two parts. One remains attached to the docking area and the angled protruding section is easily removed for winter storage, or when not in use. 8' Mooring Whip, Max 20ft Boat (up to 2,500 lb cap.) 12' Mooring Whip, Max 23ft Boat (up to 5,000 lb cap.) 14' Mooring Whip, Max 25ft Boat (up to 10,000 lb cap.)