Product review (1 stars): I recommend you don't buy these unless you're absolutely certain you'll ...
This is a cheap, flimsy product that absolutely is not worth the $14 we paid. They are the quality and consistency of a thin plastic carton you might get at the grocery store salad bar. They didn't fit our vents, and now the seller is charging $7.30 to return them. Absolute ripoff. I recommend you don't buy these unless you're absolutely certain you'll want to keep them. And honestly, you could do better by using a bent piece of cardboard.