Woodstock Safety Mirror Co. (Woodstock) is recalling certain Stop Arms, model number 03G13CH (part number 8000-1135C), manufactured July 3, 2013, to September 1, 2013. The affected stop arms have a border width of 10mm instead of the required 12mm. As a result, the front side of stop signal arm's border is obscured by more than the maximum 15 percent. As such, these stop arms fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 131, School Bus Pedestrian Safety Devices.