Black Max is a versatile, high performance wind direction indicator that attaches quickly to mast and booms on most boats such as Lasers and Sunfish. The tough, high impact plastic vane is designed to withstand years of punishment and the abuse of small boats. The stainless steel mounting arm and set screw, as well as a tough plastic mounting base, add to the system's durability. Wind vane length 8 inch (203mm).