Sailor Pen multi-function pen professional gear Imperial Black 4 16-0539-220 1. Oil based Black ballpoint pen 2. Oil based Red ballpoint pen 3. Blue ballpoint pen 4. Mechanical pencil Line width: ball diameter 0.7 mm / mechanical pencil diameter 0.5 mm HB An eraser also attached inside the cap. Ballpoint pens and a mechanical pencil are refill type. Size: 16 x 140 mm