Electric Windshield Wiper Switch 3-Position – 12V/24V – 4-Blade Universal application. For stem- or bracket-mounting. 15/32 -32 thread mounting stem, with keyway. Features: Intermittent delay feature for permanent magnet electric wiper motors Negative ground only Three positions: Off/Park – Low – High 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