You can also make your own original multi-colored pens. 1. Please select the main unit. 2.Refillable3. High-tech C collet only main parts and finished product set. Main unit component color: non-color, 3 pens. Nib diameter: 0.4mm Ink colors: black, red, blue, green, violet, pink, orange, clear blue, blue, blue, black, brown, baby pink, apricot orange, cherry pink, aqua blue, apple green.