Product review (5 stars): Perfect fit for the 36" Broan 43000 Range Hood fan.
This item is an exact fit for my 36" Broan 43000 range hood fan.  The front is a translucent white plastic to shield the light bulb from grease but allows light to pass through, the back portion is a metal mesh on the outside and a "charcoal" mesh on the inside.  The "charcoal" appears to only be so in color and I would suspect it was a black plastic mesh material similar to a pot scrubbing pad.  The manual for the fan says that the "Charcoal" version is for recirculating when you don't have an exhaust pipe, but I found it works just as well.  The extra charcoal pad may just cause the filter to gunk up with oil sooner because of the additional surface area but otherwise doesn't hard the operation of the filter.

I tried to buy one of the amazon warehouse deals to save a few dollars but all of those have creases from being bent.  I ended up buying one new.  At $12 it isn't very much to spend for something I replace infrequently.