Injen Technology X-1037BLK Black Hydro-Shield Pre-Filter 5 Pack Constructed from water repellent material for added protection from deep puddles and heavy rains Blocks larger debris from prematurely clogging your filter Simple design allows for installation in seconds Specifically designed to fit various Injen filters for best fit Fit filters with 6 diameter base x 6.875 height x 5.5 diameter top