Champion Sports Umpire Indicators, Black Go to amazon.com Related posts Expert choice for umpire's indicator FeatureUmpires keep track of their balls and strikes with this Umpire Indicator4 wheel optic yellow "call order" umpire indicator DescriptionChampion Sports 4 Wheel Baseball/Softball Umpire Indicator. 4 Wheel optic yellow 'Call Order' umpire indicator.