Avoid running out of black ink with 207 Plus & 307 Gel Pen Refills. Stainless steel tip resists bending & breaking. Medium point (0.7mm) produces rich, clean lines even on glossy paper. Advanced, nano-fiber, gel ink creates an enhanced writing experience with exceptional smoothness, drying speed & line intensity to communicate brilliantly. Ink resists smudging & smearing, making ink ideal for everyday writing tasks, taking notes & signing documents. Refills feature uni Super Ink Plus to entrap ink into paper, producing fraud-resistant, fade-resistant & water-resistant documents that prevent check washing or bleaching.