The Windex 10 is designed for simple accurate operation.
It is designed for masthead mounting in most dinghies, smaller boats and sport boats.

• Windex 10.Sport has a 10″ (25 cm) vane.
• Includes glass-reinforced poly-carbonate J-Base for side, top or front of mast mounting.
• Stands just 9.25″ (23.5 cm) tall and weighs 1.2 ounces (31 g).

Davis Windex 10 Sport Manual