PRODUCT DESCRIPTION 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-WOF Washable Electrostatic Outer Filter features a 3.23-square foot pleated 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 reusable outer filter matches your AFS-1000B or AFS-1000C air filtration system. Always trust genuine JET parts for your JET Tools. They are guaranteed to fit and work perfectly in your equipment. AMAZON.COM The Jet Washable Electrostatic Outer Filter for the 708620B AFS-1000B Air Filtration System is an ideal choice for when a durable, washable, and long-lasting filter is needed. Suitable for many wash-and-use cycles, the filter features durable filter material that cleans easily with water. FROM THE MANUFACTURER Fits AFS-1000B Air Filtration System. Washable electrostatic filter. See more