The Uniball Signo DX Rollerball Gel Pen features a twin ball mechanism preventing ink backflow and leaks and ensuring a smooth writing experience. It is filled with waterproof pigment ink so you don't have to worry about smudges.
- It has a 0.5 mm nib for extra fine lines.
- It features waterproof pigment ink.
- The twin ball mechanism prevents ink backflow and leaks.
- The colour of the ink is blue.
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