Ball end, 016w 024w 025w 030w 035w 043w. According to the maker: “A revolutionary departure from a “traditional” classical string construction, every string is wound, even the first! Made like a fine violin string, the trebles are a braided metal rope core wound on with a flat nylon monofilament, while the basses are a perlon floss core wound on with a silver plated bell bronze wire. For many years, the preferred strings of the top Brazilian guitarists, this set gives unbelievable clarity, projection and volume, almost like a steel string, with no more tension on the guitar than a traditional nylon string. Meant for fingers, not for picks.