Rotosound

Rotosound UM9 Roto ULTRAMAG SUPER LIGHT | 9-42

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High energy at your fingertips! Our new Ultramag strings are made with type 52 alloy – a highly magnetic material made from 52% nickel and 48% iron. This blend gives Ultramag strings more power, sustain, and a longer string life than traditional nickel or steel strings.