Looks good, doesn't seem sturdy enough for the price.
I like the way it looks, and it seems to hold on well to my rear windows.
It didn't come with instructions, so I was unsure about what I was mounting and what speed it's rated for, etc.
The plastic louver came scratched and bent, and the metal screws seem to be rusting already after a few weeks use.
It's pretty strong, and the included 3m tape stayed on at high speeds.
Overall, if you want louvers and don't have the money for aluminum ones, this is worth it. It's definitely not worth the $250 I paid for it, maybe $100 for a big piece of plastic.
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