Tin coated steel.
Keen Amateur
2
out of
2
found the following review helpful
Pros: Very bright, and vivid sound, with a moderate amount of warmth, but totally overpowered the rest of the strings (Dominants).
Cons: Too overpowering for other strings.
Other: It stands out a mile, compared to the Dominants, both in quality of sound, and sheer volume, as a result you would probably have to fit the entire set if you wanted a well balanced sound.
Keen Amateur
1
out of
1
found the following review helpful
Pros: Suited my fiddle,better then all the other E's i have tried.Enhanced the other strings especially the A,the strings being Superflexibles.Gave a sweet improved volume on my fiddle.
Cons: nothing not even the price.
Other: Do not think i would by the complete set,quite expensive and i am very pleased with the Superflexibles but wondering what the A string would achieve paired with the E.