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 Honda CRF 250 R (2014-2017), CRF 450 R (2013-2016).