Sun shield for Aces and Dynavibe prop balancing phototach sensor. The shield screws on to the photo sensor and prevents the sunlight from triggering the tach sensing. It also allows the use of a lesser expensive reflective tape.. This shield removes sunlight as a factor and allows the aircraft to be positioned into the wind regardless of the position of the sun. Very similar to sun shield sold by Aces Syatems for their prop balancer. 22-430-0096
