The Windex 10 Sport is designed for small boats and dinghies. It features a sapphire suspension bearing, 10" wind vane, and adjustable tacking arms with tabs. Vane and tabs feature reflectors for high visibility day and night. Includes glass reinforced poly carbonate j-base for side, top, or front of mast mounting. Stands just 9.25" tall and weighs 1.2 oz.