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Fifty black 0.5 mm gel refills in clear plastic tubes

Twokiln bixin001 0.5 mm 50-count gel pen refills

SKU CH-M2EJ-ZR2Y7 MPN bixin001

Fifty black 0.5 mm gel refills, 130 mm long, non-bleeding ink with two bonus pens included

  • Surface finishPlastic
  • Labor warranty90 days
  • Product typeRollerball, Extra Fine, 44121900
  • Key featuresExtra Fine, black, Twokiln
  • Size details.5 in
  • Pack quantity50 Count
  • 5 mm extra-fine tip gives precise, smooth lines
  • 130 mm refill length fits compatible capped rollerball pens
  • 50-count pack plus two bonus pens keeps you writing longer
  • Low-viscosity gel ink dries fast and resists bleed-through
  • Leak-proof ABC plastic barrel holds generous ink supply

What the product is

Twokiln bixin001 supplies fifty black gel-ink refills, each 0.5 mm extra-fine and 130 mm long, plus two complete pens. The refills use low-viscosity ink that dries quickly and resists bleed-through on standard paper. A highly breathable ABC plastic barrel prevents leaks and holds enough ink for extended writing sessions. Ideal for students and office workers who prefer a smooth rollerball feel.

Who this suits and who should look elsewhere

Suits anyone who writes with capped rollerball pens accepting a 5.1-inch, 0.5 mm refill and wants a large, ready-to-use stock. Not suitable for click-action pens that use a spring mechanism, as the refill body will not engage the retraction system. Buyers who need coloured ink, a broader tip size, or refills compatible with proprietary pen bodies should look elsewhere.

Deciding specification

The critical specification is the 130 mm overall length combined with a 0.5 mm extra-fine rollerball tip; only pens designed for that exact form factor will accept these refills.

How it compares

Measured against everything we stock in Pens, Pencils & Felt-Tip Markers, at today’s prices. Recalculated every night.

Price $13.99
Typical for this category: the median of 2,692 items is $13.99.

Specifications

Product
Brand nameTwokiln
Model nameBixin001
Product typeRollerball, Extra Fine, 44121900
Size & build
Surface finishPlastic
Size details.5 in
In the box
Pack quantity50 Count

Questions about this item

How can I tell the refill is flowing correctly after installing it?

Write a few turns on paper until the black gel ink flows smoothly; the 0.5 mm tip should produce a clean extra-fine line without skipping.

What comes in the package and is anything else needed?

The box contains 50 black gel refills measuring 5.1 inches (130 mm) plus two extra pens; no additional parts are required for use.

Which refill version should I choose for my pen?

Select the 0.5 mm extra-fine rollerball refill (model bixin001) if your pen accepts capped 130 mm gel refills; it is not suitable for click pens with a spring.

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