Pentel EnerGel BL77-DO Retractable Rollerball Pen Green 0.4 mm Medium Bullet Refillable

Smooth, reliable lines that support fast note-taking

The Pentel EnerGel BL77-DO delivers consistent medium-width strokes thanks to a 0.7 mm bullet nib paired with gel-based liquid ink. The combination of medium nib width and EnerGel technology enables steady ink flow and clear legibility across everyday tasks, from meeting notes to annotations. A secure metal clip keeps the rollerball pen accessible when carried in a pocket or notebook.

Clear specifications for confident choice

Nib size: 0.7 mm. Nib width: medium. Nib type: bullet. Ink type: liquid ink, gel based. Ink colour: green. Basic product colour: green. Refillable: refillable. Permanent: permanent. Weight: 12 g. Height: 147 mm. Width: 16 mm. Depth: 11 mm. Includes a rollerball gel refill. These facts are stated plainly to make comparison and selection straightforward.

Refillable design that extends service life

A refillable construction reduces the need to replace the complete writing instrument. Permanent gel ink combines long-lasting marks with the ability to swap refills as required, so the writing quality is maintained over time. The EnerGel rollerball format is engineered for ease of refilling and continued performance.

Lightweight handling suited to professional routines

At just 12 g, the rollerball pen feels light in hand and helps reduce fatigue during extended writing sessions. The medium 0.7 mm line width balances precision with smoothness, making the pen a practical choice for office work, study, and form signing. The green ink provides a distinctive alternative to standard colours while remaining suitable for annotations and creative notes.

Practical delivery and everyday readiness

Delivered with a gel refill and fitted with a clip, the Pentel EnerGel BL77-DO is ready for immediate use and simple to carry. The compact dimensions ensure compatibility with most pen loops and organisers, while the refillable mechanism supports uninterrupted usability for routine tasks.