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A dozen red capped rollerball pens in a pack

Pentel of America, Ltd.

Pentel of America, Ltd. R100B Rolling Writer Roller Ball Pen Red Medium Dozen

SKU CH-1S4P-4WS46 MPN R100B

A dozen red medium roller-ball pens with a rolling-ball tip for smooth writing

  • TypePens
  • FeaturesSold as 1 DZ.
  • ColorRed
  • Red medium ink flows smoothly for clear writing
  • Rolling ball tip reduces friction on paper
  • Capped design keeps the point protected when stored
  • Dozen pack supplies a full team or classroom
  • Pentel R100-B model has been available since 2009

Red ink medium rollerball pens

The Pentel R100-B is a capped rollerball pen that delivers red ink in a medium point. It is sold as a full dozen for offices, classrooms or home workstations that need a consistent supply of a single colour.

Replaces individual pen purchases

Buying a dedicated red dozen eliminates the need to open assorted packs just to find one red barrel. The jump is worth it when a team marks corrections, grades papers or highlights ledger entries every day and wants every writer to have the same line weight and ink flow.

Check that your workflow uses red medium point

Verify that documents, forms or house style guides call for red medium lines before ordering a full box. If the task requires black, blue, fine or broad tips, this single-colour dozen will not cover those needs.

Highlights

  • Red medium ink flows smoothly for clear writing
  • Rolling ball tip reduces friction on paper
  • Capped design keeps the point protected when stored
  • Dozen pack supplies a full team or classroom
  • Pentel R100-B model has been available since 2009

Specifications

TypePens
BrandPentel
ModelR100-B
FeaturesSold as 1 DZ.
ColorRed
Shipping weight0.09 kg
Package size147 × 76 × 33 mm

Questions about this item

What ink refill fits the Pentel R100B roller ball pen?

The R100B uses Pentel standard roller ball refills; check the barrel for the exact refill code before ordering a replacement.

Which step do users often miss when starting a new Pentel R100B pen?

Remove the protective cap, then press the tip firmly on scrap paper until red ink flows — skipping this priming step leaves the pen appearing dry.

When should the Pentel R100B roller ball pen be replaced instead of refilled?

Replace the pen if the tip is bent, the ball no longer rotates smoothly, or the barrel cracks; otherwise a standard refill restores writing performance.

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