Product review (4 stars): This filter is designed for recirculating range vents.
The dimension of this filter fits the Nutone model #RL6300.  In addition to the three layers mess material there is black (I assume charcoal) fabric layer.  This design is desirable for recirculating range vents.  The vent over my range is vented to the outside.  I intend to use this replacement filter and will remove the black fabric and clean the metal mess layers so I reuse it in the outside vented range hood.
The seller fulfilled this order in an acceptable amount of time.