Chromesteel on steel core. Orchestra tuning.
Originals/Flexocores to Passiones = Win
Pros: Immediate sound, soft but bright and punchy. (I had Pirastro Flexocore and Originals before and they were too tight and edgy. Feel slightly thinner under the fingers Quick response I play a mid-C.19th English bass, flat back.
Cons: None, so far