Lol I know tell me about...I was just looking on the RWS Enduro bearing website and found these, never seen them before, they do a cheaper version though for only $99..

Apparently they last/wear well....

 Yeah, made of Delrin which I believe is a type of plastic. After I'd seen these I was looking into thier Enduro bb's and found a disturbing thread about how crap they are!...not sure if that was just something that happened a while back but still....