Uni-ball Eye UB-150 Rollerball Pens 10-Pack

Uni-ball Eye UB-150 Micro 0.5mm Liquid Ink Rollerball Pens (10-Pack Box)

The Uni-ball Eye UB-150 stands as a benchmark in precision rollerball design, trusted worldwide for decades by professionals, students, and drafters. Built with Mitsubishi Pencil's proprietary Uni-Flow internal ink feed system, the UB-150 regulates internal reservoir pressure automatically to ensure smooth, continuous ink delivery down to the very last drop without skipping, blotting, or sudden ink drops. Each pen features a hardwearing stainless steel tip that glides effortlessly across paper, making extended writing sessions, note-taking, and documentation fatigue-free.

Key Features

• Uni-Flow Reservoir System: Maintains balanced air-liquid pressure for consistent ink saturation and flawless starting on the first stroke.
• Archival uni Super Ink: Pigment-based formula bonds deeply with paper fibers, providing outstanding water resistance, lightfastness, and chemical tamper resistance.
• Durable Stainless Steel Tip: Precision-crafted 0.5mm micro ball withstands heavy hand pressure while producing a steady, ultra-clean 0.35mm line.
• Visible Ink Window: Transparent barrel indicator lets you effortlessly check ink supply before meetings, study sessions, or exams.
• Economical 10-Pen Box: Ideal bulk pack for busy offices, classrooms, financial record-keeping, and legal archiving.

Product Specifications

• Brand: Uni-ball (Mitsubishi Pencil Co., Ltd.)
• Model: UB-150 (Eye Micro)
• Tip Size: 0.5 mm (Micro ball diameter)
• Ink Type: Liquid pigment-based ink (Fade-proof, Waterproof)
• Ink Color: Black
• Tip Material: Stainless steel with tungsten carbide ball
• Cap Type: Snap-on cap with sturdy stainless steel pocket clip
• Package Quantity: 10 pens per box
• Country of Origin: Japan

Frequently Asked Questions

Q: What makes the Uni-ball UB-150 different from standard gel pens?
A: The UB-150 uses free-flowing liquid pigment ink regulated by a multi-channel feed rather than a high-viscosity gel paste. This delivers immediate ink transfer with virtually zero writing friction and a richer, more saturated line.

Q: Is the ink waterproof and smudge-proof once dry?
A: Yes. The specialized uni Super Ink formula uses fine pigment particles that permanently lock into paper cellulose, resisting water, alcohol, highlighter bleed, and UV fading.

Q: Can the pen be refilled once empty?
A: The Uni-ball Eye UB-150 is designed as a direct-fill disposable liquid ink rollerball with a sealed high-capacity reservoir, maximizing ink volume and leak prevention during travel.

Q: What is the store's customer service and order cancellation policy?
A: For order inquiries, contact our customer service team at szjyf@outlook.com. Full refunds are available upon request anytime before your shipment confirmation is issued.