Pentel BL437R1-A Gelpen Black Ink Black Body

With a 0.7mm tip, the Pentel EnerGel Kuro BL437R1-A produces high-speed documentation via liquid gel ink. Retractable metal tips protect the 0.35mm line width during storage. Replacing the standard BL437, this Kuro model uses a slimline matte black barrel for higher grip density.

Key Features

1. EnerGel Liquid Gel Ink: High-performance technology combines liquid and gel ink for fast drying. Smears won't happen even for left-handed writers.
2. Latex-free Rubber Grip: Textured surface provides high friction for precise stroke control. Reduces hand fatigue during long sessions.
3. 0.7mm Metal Tip: Stainless steel housing outputs a consistent 0.35mm line width. High-pressure writing won't bend the tip.
4. Retractable Build: Internal spring-loaded mechanism hides the metal tip with one click. Stops ink stains on pockets.
5. Refillable Core: Plastic barrel accepts standard Pentel EnerGel internal ink refills. Extends usage life of the pen.

Frequently Asked Questions

Is Pentel EnerGel Kuro refillable?

Yes, the barrel accepts standard EnerGel internal refills. This extends the service life of the matte black casing.

Is Pentel EnerGel ink waterproof?

No, this liquid gel ink formula prioritizes fast drying over water resistance. Heavy rain or spills will cause the ink to bleed.