Excellent ProjectionHigh Carbon Steel Round CorePolished Chromium Alloy WrappingMade in the USA by Super-Sensitive Musical String Co.Provides PerformanceThe Premium String delivers quality sound for the advancing player.The Chromium winding provides the projection advancing players seekThe high polish on the string reduces overtonesPremium translates to a lasting, durable string with excellent performance qualitiesPackaged from bulk into envelopesNeed help changing strings? Contact us for installation services.