This is a Wind indicator designed for use in target sports. The ‘WIND INDICATOR’ prints in 4 parts. 2 of these are tiny locator pins for the vane. Be careful not to loose them when peeling the print from the plate. The second plate is the ‘WIND INDICATOR ADAPTOR’ and allows for the ‘WIND INDICATOR’ to be used with a standard tripod. It has a ¼ - 20 integrated thread. Once assembled the vane will indacte wind direction. To show wind intensity you can add a ribbon at the rear of the vane as pictured. Enjoy!