The K&N E-4665 replacement air filter is constructed with an oil-free synthetic media. A tube of grease is provided in the packaging so that there is an airtight fit in case of severe vibrations. The E-4665 provides superior filtration protecting your equipment’s engine. This K&N air filter can be cleaned and used again, lasting the life of your equipment. K&N E-4665 is easy to install and will fit into your factory air box. K&N E-4665 fits some John Deere lawnmowers and some Briggs & Stratton lawnmowers, as well as other applications.