D1 Mini Refill vs. Schmidt Euro Rollerball Refill
Comparing 2 standards across 12 specifications. 12 key differences identified.
The D1 Refill (standardized under ISO 12757-1 as Type D) is a standardized miniature metal-cased ballpoint/gel refill measuring exactly 67.0 mm in length and 2.35 mm in diameter. Friction-fit into internal selector sleeves, it is the universal standard for multi-function pens (3-in-1, 4-in-1), compact pocket pens, and precision stylus combinations.
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.
Specification Comparison Table
12 Parameters| Parameter / Spec | ||
|---|---|---|
|
Overall Length
|
67.0 ± 0.5 mm (2.64 in) | 110.6 ± 0.3 mm (4.35 in) |
|
Outer Tube Diameter
|
2.35 ± 0.05 mm (0.093 in) | — |
|
Mounting Mechanism
|
Friction-fit slide sleeve (no threads or springs attached to refill body) | — |
|
ISO Standard Code
|
ISO 12757-1 Type D | — |
|
Ink Varieties
|
Hybrid low-viscosity (Uni Jetstream SXR-200), Gel (Zebra JSB), standard ballpoint (Lamy M21, Schmidt 635) | — |
|
Benchmark Multi-Pens
|
Lamy 2000 4-Color, Rotring 600 3-in-1, Zebra Sharbo X, Kaweco Liliput ballpoint | — |
|
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 |