AIHAO Back-to-School Essential 4-in-1 Retractable Gel Pen Black Red Blue Green 0.5mm Bullet Tip Multi-Color Pen Set of 4 GP2470

Four-color pen with easy click-switch mechanism for effortless color changing

Non-slip triangular grip with fine anti-slip texture for comfortable and stable writing

Multi-cartridge design allowing easy replacement and long-lasting use

Color-coded note-taking system based on color psychology and brain memory techniques:

Designed to enhance study efficiency and highlight key points, saving time and effort

Suitable for segmented annotation and four-color note-taking methods

Ergonomic design supports proper grip and smooth writing experience

Product dimensions are manually measured and may have slight deviations; actual product prevails

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