You know I pulled some of them out of my car, that supposedly were 10 years old, they were actually cracked, malformed, one control arm? it slid out a little bit, and when I did pull em out I could crush em between two fingers... I'm stuck between Rubber and Delrin, personally ,at this point in my life,not that I have to do it again anytime soon, unless someone hands me a winning lottery ticket, and I start scooping up cars cuz I'd be doing that for fun!