A circular disk covered in rubber or plastic with a hole in the center where the edge is sometimes tensioned by a spring that prevents fluid from leaking at the Windshield Washer Fluid Pump. Headlight Washer Pump Grommet. Windshield Washer Pump Grommet. gasket. Headlight. Level sensor. Windshield. Included with: Reservoir assembly, Washer Reservoir, Washer Reservoir,.