THE INDEX
Fine points.
Useful details.
Twenty original source-linked guides. No invented writing or paper trials.
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.
Three dated official US offers, with different selling units
A complete gel pen, a gel refill and a highlighter are three distinct purchases.