Needle point, tungsten carburate ball. liquid Ink. Visible level. ergonomical rubber grip, metal hood to clip. 1) Needle point: point 0,5 mm, line 0,3 mm, thin: color of ink: blue-red-green 2) Needle point: point 0,7 mm, line 0,5 mm: average: color of ink: black-blue-red-green-purple-turqouise-rose 3) Needle point: point 1 mm, line 0,7 mm: large: color of ink: black-blue-red-green roller pen grip.