John Pearse® Mandolin Phosphor Bronze Medium, .011 - .040, 2150Mstar rating 5Joe PrassaMarch 7, 2010In my opinion, Pearse strings are the best mandolin strings made. I've used the 80/20's for a long time but decided to try the phosphor bronze. My mandolin responds and sounds better with the phosphor bronze. I think it will depend on the instrument but mine definitely like them.