The K&N 33-2238 is a synthetic oil-free replacement air filter manufactured to provide exceptional filtration to your small engine or light industrial equipment. This air filter reduces restriction allowing the engine to breathe more efficiently.. It is reusable, so it can be washed with K&N synthetic air filter cleaner then reinstalled to use again and again. The K&N 33-2238 air filter fits some Craftsman lawnmowers with 6.5 HP engines, some Honda and Briggs & Stratton engines and other small engine applications.