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An empty refill does not have to mean the end of a good writing instrument. With the right ballpoint and rollerball refills, you can continue using a familiar pen. However, choosing the right one is not as simple as terms such as “universal” or “suitable for many models” might suggest. The shape, mechanism, type of ink and tip must all match the pen in question.
This Joybuy buying guide from the Product Recommendation Officer explains what individuals, school pupils, students, office workers and frequent writers should look out for.
Many ballpoint refills follow widely used designs such as the Parker G2 or Parker-style format. This can make choosing easier, but it does not replace checking your own pen. For example, a Parker Quinkflow Medium Tip Black Ballpoint Pen Refill is designed for the Parker Jotter, Jotter XL, Urban, Vector and other models with a G2 fitting. However, it will not fit Parker fountain pens or Parker rollerball pens.
LAMY also uses different systems: LAMY M16, LAMY M21, LAMY M22, LAMY M63 and LAMY M66 are not interchangeable at will. For example, an M22 refill for the LAMY pico is not designed for a LAMY Safari ballpoint pen.
A ballpoint refill usually contains oil-based ink. A rollerball refill generally uses fluid, water-based ink and often requires a cap to prevent the tip from drying out. A gel refill uses gel ink and can be used in compatible ballpoint pens.
This means that the external length or colour alone is not enough to identify a refill. The decisive factors are the pen’s designation, the shape of the tip and the mechanism inside the barrel.
A blue refill is suitable for notes and many everyday situations, while a black refill is often used for business correspondence. A red or green refill can be useful for correcting, highlighting or structuring information.
Claims such as water-resistant ink, document-proof refill or “suitable for documents” should be checked directly in the product information. When signing contracts, completing forms or making permanent records, it is also important to check whether the refill is genuinely suitable for the type of document concerned. A Pilot FriXion refill is erasable and is therefore not suitable for documents where entries must remain permanently visible.
Before buying, remove the old refill and read its markings. The model number is often printed directly on the barrel. For LAMY, the following designations are particularly relevant:
These designations are intended as a guide. The specific product description for the pen in question remains the deciding factor.
The markings F, M and B generally stand for fine, medium and broad. A fine tip is suitable for small handwriting, calendars and precise notes. A medium tip is designed for many everyday writing situations. A broad tip produces visibly bolder lines.
The Parker Gel Refill M 0,7 mm Blue and the Parker Gel Refill M 0,7 mm Black use a medium tip with a stated line width of 0,7 mm. The Parker Rollerball Refill F Blue, by contrast, is specified as having a fine tip of approximately 0,5 mm. The actual line width may vary depending on the paper and writing pressure.
Oil-based ballpoint ink is generally less sensitive to longer pauses between writing sessions. Water-based rollerball ink produces a smoother flow, but can dry out more quickly if the tip is left uncovered. Gel ink offers different colour reproduction and a different writing experience.
When using erasable thermo-gel ink such as Pilot FriXion, exposure to heat should be avoided. According to the product information, the writing may become invisible at high temperatures. For examination papers, legal documents and permanent records, a non-erasable refill is therefore the more suitable choice.
Why this product suits this profile: The single refill is a practical choice when you need a black refill for a compatible Parker ballpoint pen or a pen with a Parker G2 fitting.
The product description specifies the G2 format and distinguishes ballpoint pens from Parker rollerball pens and fountain pens.
Black, medium tip; oil-based ink and Quinkflow technology according to the product information.
Why this product suits this profile: The blue rollerball refill is designed for LAMY rollerball pens with a cap and offers a medium writing width.
The M63 designation helps distinguish it from M66 refills for other LAMY rollerball systems.
Blue, medium rollerball refill; metal construction and stated dimensions of 6 × 6 × 115 mm.
Why this product suits this profile: Three blue FriXion refills with a 0,7-mm tip are ideal for people who write frequently and want to amend their entries.
The product information clearly states that the ink is erasable and has limited suitability for official documents.
Pack of three; blue gel ink; compatible with the specified FriXion Ball, Ball Pro and Clicker models.
Why this product suits this profile: The medium blue rollerball refill is designed for Parker rollerball pens and is ideal for regular note-taking and formal writing situations.
The product description explicitly distinguishes this refill from Parker ballpoint G2 refills and gel refills.
Medium tip with a stated ball size of 1,4 mm; blue, document-proof ink according to the product information.
We have put together a complete, regularly updated list of products that fully meet these strict selection criteria and the safety regulations applicable in the EU.
When replacing a refill, first open the pen according to its construction. Then pull the empty refill straight out and insert the new one fully. With click or twist ballpoint pens, the tip must then lock into place correctly. For capped rollerball pens, the refill should sit firmly after insertion, and the pen should be closed after use.
Store spare refills in a dry place, away from direct sunlight and not in a heated vehicle. FriXion refills require particular care around heat. Pack size also affects ongoing costs: a single refill is suitable for occasional replacement, while a pack of three or ten may be more practical for frequent writers.
First, check the brand, model and markings on the old refill. For Parker, the G2 format is often relevant; for LAMY, common designations include M16, M21 and M22. If you are unsure, compare the length, diameter, tip and end cap with the product information.
Service life depends on the amount of ink, line width, writing pressure, paper and daily use. A general time frame is therefore not reliable. A refill should be replaced when the ink flow continually stops or the writing becomes noticeably uneven.
This depends on the specific ink. Rollerball refills often use water-based ink, while ballpoint refills generally contain oil-based ink. Terms such as “water-resistant” or “document-proof” should only be used when they are stated in the specific product information. Erasable FriXion ink is not designed for permanent official documents.