Classical, Flamenco guitar machine Heads from Der Jung. This is the top of the line machine head series made by Der Jung for Classical or Flamenco guitars. It includes 6 Machine heads with oval Black pearl buttons with metal plated sides, featuring a very dynamic new design. Also included are matching brass color screws for perfect installation. These machines have 35mm/120mm spacing, 18:1 Gear Ratio The machines are made of heavy metal with deep engravings. The oval black buttons are made of black pearl-like material and are reinforced with inside screws for a softer and more accurate tuning.