The Magma GE160SF Electric Guitar Strings are made of stainless steel round wound and then flattened, providing sustain, higher volume, and brilliance than traditional flat strings. The soft and smooth playing surface eliminates unwanted finger noise and squeaks, providing a clear, deep sound. These strings are ideal for all musical styles, not just jazz. The set includes two additional strings: one plain and one wound. The GE160SF strings come in a light gauge (.011-.050) and are anti-corrosive and recyclable.