KACO x SMILEYWORLD 0.5mm Retractable Black Gel Pen Bullet Tip High-Value Niche Signature Pen for Middle School Students Carbon Ink Pen 5-Pack Set

KEFILL proprietary refill technology developed by KACO.

Fast-drying ink combined with dual-ball pen tip technology.

Enhanced writing experience with upgraded ink and pen tip.

Fast-drying ink ensures clean paper surface without smudging.

Dual-ball pen tip allows smooth writing at a low angle of approximately 48°, compared to the usual 60° required for single-ball tips.

Writing angle may vary depending on individual habits.

Test paper complies with GB/T12654 standard.

Data based on Shanghai Wencai Laboratory testing.

Collaboration with SMILEYWORLD emphasizes creativity, emotional positivity, and self-expression.

The product combines innovative technology with award-winning design for a superior writing experience.