Bibtone FINEST U.S.A. Steel HQE 0942 HQ Electric Guitar Strings 09-42 Bibtone strings are made with FINEST U.S.A. Steel Wrapped around American hexagonal steel core wire String Gauge: 1E : 009, 2B : 011, 3G : 016, 4D : 024, 5A : 032, 6E : 042 These strings are made from nickel-plated steel wire. Corrosion resistant packaging to keep strings fresh.