Refill for gel pen uni Mitsubishi Pencil SXR-72 — black — compatible with SX101

The uni Mitsubishi Pencil SXR-72 refill in black is a gel/rollerball ink refill compatible with pens that accept SX101-type cartridges. It is designed as a direct replacement to restore smooth writing performance and consistent black ink flow for everyday use, including note-taking, signing and general office tasks. The refill fits standard pen housings specified for SX101-compatible refills and provides the familiar gel ink feel associated with uni Mitsubishi Pencil products.

Advantages

This refill delivers even black ink distribution and a smooth glide across paper, reducing skipping and improving line consistency. Its gel-based formulation offers a balance between quick-drying properties and saturated color for clear legibility. The refill is straightforward to install and designed for reliable, long-lasting performance in pens that accept SX101-compatible cartridges.

Suitable for

• Everyday writing and note-taking
• Signing documents and forms
• Office, school and home use
• Replacing depleted SX101-compatible gel/rollerball refills

Key specifications

• Ink type: gel/rollerball black ink
• Compatibility: fits pens that accept SX101-style refills
• Purpose: replacement refill for everyday writing tasks
• Installation: push-in cartridge format for simple replacement

How to use

Remove the empty refill from your pen according to the pen manufacturer's instructions, insert the SXR-72 refill into the pen body until it seats securely, and reassemble the pen. Begin writing to confirm proper ink flow. If the refill does not engage, remove and reinsert to ensure correct alignment. Store unused refills capped or in a dry place to prevent drying or leakage.

Usage recommendations

For best results, use this refill in pens explicitly compatible with SX101-style cartridges and allow a few strokes on scrap paper after installation to establish steady ink flow. Avoid exposure to extreme temperatures and store capped pens horizontally or tip-down for short periods to maintain consistent performance.