Rollerball pen refill features high-quality ink that never dries out and works beautifully on most surfaces for consistently flawless results. Fine point (0.5mm) creates smooth, precise lines for detailed handwriting. Easy-to-use design allows quick replacement for simple operation. Pen refill is designed for Waterman rollerball pens (sold separately).Rollerball pen refill features high-quality ink that never dries out and works beautifully on most surfaces for consistently flawless results. Fine point (0.5mm) creates smooth, precise lines for detailed handwriting. Easy-to-use design allows quick replacement for simple operation. Pen refill is designed for Waterman rollerball pens (sold separately).