I need to get a new nut for my bass. I know there are several different types out there. I know they dont affect overall tone in a very noticable way. What I dont know is, is one type better than the other? I was thinking of a brass one, but Im a bit leary, for some reason I have this fear that it might shorten the life of my strings and maybe affect the tone somehow. Ive also thought about graphite and bone. I just dont know which would be the best possible one to go with. The only nuts Ive ever had were plastic.