Stainless steel for long life and resistance to corosion
not durable and lack of projection
Pros: The string had a nice tone to it.
Cons: I was very disappointed in this string as after using it on only 4 gigs over a fortnight the string snapped during a gig! Although it had a nice tone, the string didn't have much projection and was much quieter than the other strings-I also use primm for the other strings, so I thought it would blend somehow but it didn't. I won't be using this string again.