Product review (5 stars): Twice the thickness as filter that comes with Broan vent
Excellent product compared to what actually comes with vent purchase.  This filter is double thick and will protect fan & motor much more efficiently.  Purchase can of Stanley Home Products foaming degreaser.  One spray over entire filter, let sit for 5 to 10 minutes,  rinse with hot water and filter comes out as brand new with no scrubbing.  Better to purchase filter at Air Filter Company for $5.00 or on Amazon for $6 and some change.  Checked at local hardware store Menards, they only sell the cheapy thin one at $15.95.  So this is a great product at a great price.
Buy 2 in case you don't want to wash dirty one immediately.
Note:  Not dishwasher safe.  Learned the hard way.  Comes out blah charcoal gray.