b5 hand-free loose spiral notebook detachable notebook book simple coil for junior high school students and high school students B5不硌手活页本可拆卸笔记本本子简约线圈大学生初中生高中生专用

[solid white] 2 shell +2 buttons [solid black] 2 shell +2 buttons [pink] 2 shell +2 buttons [retro red] 2 shell +2 buttons [retro green] shell +2 buttons [yellow] 2 shell +2 buttons [dark blue] shell + button [clear] shell + button inner core 1 book 60 sheets [horizontal line]] inner core 1 book 60 sheets [grid]] [transparent black] shell + button [light green] shell + button [light purple] 2 shell +2 buttons [light blue] 2 shell +2 buttons [beige] 2 shell +2 buttons inner core 1 book 60 sheets [blank]]

b5 a5 a4