Feather Vane Race 1. Masthead Mount Wind Indicator. Features High Stability won't overreact, minimal flutter. Carbon fiber construction to withstand the rigors of high performance racing. Low Friction Bearing the heart of Race 1. Ultralight less than 10g all up. Ultra Sensitive the 0.3mm carbon responds reliably to the lightest of airs, you pick up the shifts before the competition. 3mm shaft fits standard burgee clip, dedicated feather vane socket included. Vane Length 8 . Height 12.99 Masthead Mount Wind Indicator. Features High Stability won't overreact, minimal flutter. Carbon fiber construction to withstand the rigors Low Friction Bearing the heart of Race 1. Ultralight less than 10g all up Ultra Sensitive the 0.3mm carbon responds reliably to the lightest of airs, you pick up Vane Length 8 Height 12.99