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Red retractable gel pen with triangular barrel and grip

Pentel of America, Ltd.

Pentel of America, Ltd. K437B Red Retractable Gel Pen

SKU CH-PQGC-QVZNS MPN K437B

Retractable gel pen with triangular barrel for grip comfort and roll resistance, permanent fade-proof acid-free red ink

  • TypePens
  • FeaturesPermanent, fade proof and acid
  • ColorRed
  • Triangular barrel prevents rolling off desks
  • Latex-free grip gives maximum comfort and control
  • Retractable click mechanism advances and retracts tip
  • Permanent ink is waterproof, fade-proof and acid-free
  • Red medium point gel delivers smooth writing

Red retractable gel pen for everyday writing

The Pentel K437B uses a medium-point gel tip that delivers smooth red ink. Its triangular barrel prevents the pen from rolling off flat surfaces. The ink formulation is permanent, waterproof, fade-proof and acid-free for archival quality. A latex-free grip provides comfort during extended writing sessions.

Click mechanism and grip improve daily use

A top click advances the tip and a side button retracts it, protecting pockets and pen cups from stray marks. The triangular grip shape encourages a relaxed hold that reduces hand fatigue. These features replace the need for a separate cap that can be lost. The design suits both left- and right-handed writers equally.

Simple to start using with minimal issues

Remove the pen from the pack and click the top once to begin writing. No refills or cartridges are included in this dozen pack. The gel ink may skip briefly on very glossy paper until the ball seats. Store the pen tip-up when not in use to prevent leakage.

Highlights

  • Triangular barrel prevents rolling off desks
  • Latex-free grip gives maximum comfort and control
  • Retractable click mechanism advances and retracts tip
  • Permanent ink is waterproof, fade-proof and acid-free
  • Red medium point gel delivers smooth writing

Specifications

TypePens
BrandPentel
ModelK437B
FeaturesPermanent, fade proof and acid
ColorRed
Shipping weight0.15 kg
Package size152 × 89 × 33 mm

Questions about this item

When will the K437B pen need a refill?

The K437B uses a standard gel ink cartridge; replace it when the red ink stops flowing or the line becomes faint.

What limits continuous writing with the K437B?

The latex-free triangular grip is designed for maximum comfort and control, so hand fatigue is the practical limit during long sessions.

Does the K437B get warm or make noise after hours of use?

No — it is a mechanical gel pen with a click-top advance and side-button retract, so it produces no heat and only a faint click sound.

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