Washer reservoir packing. 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. A rubber ring with a hole in the center which provides protection through which Back Glass Wiper Motor related components pass through. Cold Spec. From 07/03. Headlight Washer Pump Grommet. Part included in Reservoir assembly. Seals between reservoir and washer pump. Washer Fluid Reservoir Insulator. Washer Fluid Reservoir Mounting Grommet. Washer Fluid Reservoir Seal. Windshield Washer Pump Grommet. Included with: Reservoir, Reservoir assembly, Washer reservoir, Wire harness.