Universal Rubber Filter Round Tapered 6in Flange ID x 7.5in Base OD x 5.25in Top OD x 8in Height (KNNRU-3101HBK)Breathe easy and boost performance with the Universal Rubber Filter Round Tapered 6in Flange ID x 7. 5in Base OD x 5. 25in Top OD x 8in Height from K&N. This high flow replacement air filter is designed to increase horsepower and acceleration while providing outstanding filtration. Unlike disposable paper filters, K&N filters are washable and reusable so you buy once and never worry about replacements again. Features Advanced synthetic filtration