These guitar strings are specifically designed for electric guitar. They are made of nickel-plated high-carbon steel with an alloy wound string and a quality steel core. Each set includes 6 strings, with the following measurements: E-1st-0.02cm, B-2nd-0.03cm, G-3rd-0.04cm, D-4th-0.06cm, A-5th-0.08cm, E-6th-0.11cm.