The Airbox Cover prevents water & cleansers from entering your intake when cleaning the airbox. * Airbox Covers are manufactured from tough, durable ABS plastic * A rubber sealing ring is provided to insure a perfect, leak-free fit * To use, simply remove your airfilter from the airbox & install the Airbox Cover with the provided mounting screw Article: TWIN AIR Air Filter Cover Kawasaki KX250/450F