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- Standard size rollerball refill
- 0.5mm line width
- 2-3 days cap off time
- Diameter: 6mm
- Length: 110mm
The Schneider Topball 850 features a wear-resistant stainless steel tip and is the refill for Schneider's Topball 811 pen. Writes with an approx 0.5mm line and will not dry out even if the cap is left off for 2-3 days.