Electric Windshield Wiper Switch 3-Position - 12V/24V - 4-BladeUniversal application. For stem- or bracket-mounting. 15/32"-32 thread mounting stem, with keyway. Features:Intermittent delay feature for permanent magnet electric wiper motorsNegative ground only Three positions: Off/Park - Low - High a 7/16"-28 x .45" (11.3mm) mounting stem unless noted otherwise Round black plastic, white imprinted knob with metal insert and set screw included unless noted otherwise Controls single motor unless noted otherwise