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Washable and reusableDesigned for industrial and small engine applicationsHigh air flow with excellent filtrationEase of maintenanceOne year limited warrantyThe K&N E-4284 replacement air filter is constructed with layers of woven cotton for outstanding filtration and low air restriction to help your engine run more efficiently. This air filter can be washed and reused. The E-4284 is easy to install and is custom designed to fit right into the factory air box of some Wisconsin/Robin engines, as well as other applications.