Windicator WP200S - Topper, Optimist, Starling & Blokart ClassThe Windicator Range is synonymous with the Kiwi Yachting scene. They have been made in New Zealand for over 30 years and are designed and manufactured by precision engineers and made from the best available materials; considered the best wind direction indicator by leading sailors and riggers. 100% accurate in 2 knots of wind.Features:Fits any 45-50mm (1.75-2") diameter mast.; Designed specifically for the Topper, Optimist, Starling and Blokart class.; 100% accurate in 2 knots of wind and weighs just 29g (1oz). Simple and effective clamp eliminates the need for straps.; - cis2:mm5mnJlm -