The Airbox Cover prevents water and 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 and install the Airbox Cover with the provided mounting screw. For Beta RR 125 2T, RR 200 2T, RR 250 2T, RR 300 2T, RR 350 4T, RR 390 4T, RR 430 4T, RR 480 4T (2020).