What are you looking for?

A 0.7 mm point is not our measured line width ↗

Keep the catalog point size separate from the mark on your own paper.

Fine and medium need a product family beside them ↗

A word on a catalog is less specific than the exact model and declared size.

Find the exact refill family before comparing price ↗

BL77 and SXS15 use different manufacturer-listed refill families.

A chisel tip offers two marking orientations ↗

Broad and fine descriptions do not supply a tested numeric width.

Read the ink family before assuming a surface use ↗

Liquid gel, highlighter and permanent-marker names answer different questions.

Retractable design does not establish an unlimited open life ↗

Manufacturer seal claims are distinct from a measured drying or lifespan result.

A four-pack price needs a four-piece denominator ↗

The current official single and yellow four-pack are nearly equal per item.

A cheaper refill is not a complete new pen ↗

Compare replacement options only after the body and refill family are known.

Paper weight alone does not certify an ink pairing ↗

A paper number does not replace evidence about the exact pen and surface.

Highlighter-over-gel behavior is an untested pairing here ↗

Do not turn quick-dry language into a measured smear-free promise.

Count bodies, refills and colors separately ↗

A mixed pack can have several useful quantities rather than one universal count.

Check the form or institution rule before choosing a pen ↗

A product label does not establish acceptance for every official document.

An assorted pack may not cover a single-color target ↗

Total pieces and required-color pieces are different denominators.

Build a stock plan by required color and known count ↗

User-entered allocation replaces an invented pen-consumption forecast.

Permanent and washable claims need an exact product ↗

Color and housing do not establish removal or surface behavior.

Keep the body code when the first cartridge is empty ↗

A small identity record makes a later refill lookup possible.

Read a certification claim at its exact product scope ↗

A listed highlighter SKU does not certify every pen or every use.

An unlisted body stays unverified in the refill finder ↗

A narrow lookup is more useful when its boundary is visible.

Reorder quantities without inventing a writing lifetime ↗

Allocation and observed stock do not predict pages, months or meters of use.