Windex 15. The 15" (38.1cm) vane can be through bolted or tapped into the masthead. The mounting socket has a 5/16"–18 thread. The entire unit weighs only 3.9 ounces (111 g). Features spike above vane to keep birds off your mast. Sapphire suspension system and reflector tabs on the bottom surfaces make Windex 15 highly sensitive and visible even at night!

15" Windex vane
For medium to larger boats
Bird-proof spike extends above vane to keep the birds off the mast.
Most popular wind indicator in the world.