Trust JET-branded filters to provide the high quality and guaranteed performance necessary to keep your equipment operating at peak efficiency. The JET AFS-1B-IF Replacement Inner Filter features a 12.92-square-foot three-pocket filter with a minimum efficiency reporting value (MERV) rating of 11, meaning this filter excels at trapping particles between 1 and 10 microns in size. Perfect for a smaller home shop, the long lasting, high quality disposable outer filter matches your AFS-1000B or AFS-1000C air filtration system. Trust genuine JET replacement parts when its time to exchange a component.