The Pirastro No.1 “Universal” E-string has a coated carbon steel core material with a high-tensile strength and is wound with a very thin chrome steel flat-wire. The sound is warm, sweet, and brilliant - without any whistling.

As the No.1 E-string is wound with chrome steel, it is long-lasting. Chrome steel cannot corrode and is not affected by hand perspiration.

Pirastro No. 1 Universal E string composition: Chrome steel over carbon steel