Briggs & Stratton Pressure Washer Pump Saver - 4 Oz. 6039 Protects the pistons of your pressure washer and seals them from damage Uses a unique anti-freeze and lubricant formula For use before extended storage and prior to startup the following season to keep your pump running on full blast 4-ounce bottle can be used with most brands of pressure washers Genuine OEM replacement part