k35 press gel pen large capacity 0.5 bullet carbon pen office culture student exam stationery brush pen k35按动中性笔大容量0.5子弹头碳素笔办公文化学生考试文具刷题笔

black [single]] red [single]] blue [single]] black [single refill]] red refill [single]] blue refill [single]] black boxed [12 pack]] red boxed [12 pack]] blue boxed [12 pack]]

0.5mm bullet