Not much different than the smoked or clear turn signals on our ole Benzes. Could call those rice material too. To answer your question: they are probably crappy quality and won't match up to OEM.

That is if they are really cheap and made in Taiwan. I got some smoked turn signals for my 300D and they didn't even fit, at all. 30 bucks or so down the drain.

__________________
1985 CA 300D Turbo , 213K mi