Schmidt Euro Rollerball Refill
Pens, Inks & Leads · 7 specs
Direct Answer
The Euro-Format Rollerball Refill (standardized under DIN 16554 and defined by the Schmidt Safety Ceramic 888/5888 format) is the industry benchmark for luxury capped liquid-ink rollerball pens. Measuring 110.6 mm in length and 6.2 mm in barrel diameter with a ceramic ball tip, it is utilized across hundreds of fine writing brands.
Source: DIN 16554 / Schmidt Technology GmbH Technical Data Sheet · Last reviewed Aug 28, 2026
Specs
| Overall Length | 110.6 ± 0.3 mm (4.35 in) |
| Barrel Diameter | 6.2 ± 0.1 mm (0.244 in) |
| Tip Collar Diameter | 2.5 mm extending 19.5 mm from shoulder |
| Ball Material | Sintered ceramic ruby ball (0.5 mm Fine, 0.7 mm Medium, 1.0 mm Broad) |
| Safety Ceramic Venting | Schmidt extended cap-off time technology prevents tip drying for up to 1 year uncapped |
| Refill Barrel Variants | Schmidt 888 (plastic tube) / Schmidt 5888 (metal casing) |
| Brand Compatibility | Pelikan, Faber-Castell, Visconti, Kaweco, Retro 51, ACME Studio, OMAS |
Capped Pen Geometry
Because genuine liquid rollerball ink has low viscosity (similar to fountain pen ink), Euro-format refills are designed for capped pens where an airtight inner cap seal prevents evaporation. Retractable twist or click pens generally require pressurized G2 refills instead.