Product review (4 stars): Good if you need them
These are something I had to have as the range hood isn't vented. They were much cheaper on Amazon then at Lowe's and Home Depot. The trick to install them is to clip the shorter curved side on the front of the current screen and then flip it over to the back of these. They do randomly rattle now when the fan is on high speed so I'll have to see if there's some way to fix that. I guess that's to be expected as it's just metal on metal, but if they doubled up the clips it would hold them together tighter. They do actually seem to help filter the cooking smells better then without them.