**Product Specifications:**
**Brand:** (ShuXing)
**Model:** LOOSE Leaf Notebook
**Design:** No hand, minimalist style
**Material:** CSIIAWINIW
**Features:** Simple and comfortable design, same-day shipping
**Options:** Multiple color schemes available
**Binding:** Loose-leaf, easy to replace inner core
**Thickness:** Regular (40 sheets/80 pages) or Thickened (60 sheets/120 pages)
**Paper:** 80gsm thickened paper, suitable for double-sided writing
**Compatibility:** Suitable for various pens such as fountain pens, gel pens, and ballpoint pens
**Line Style:** Horizontal lines, 8mm spacing
**Usage:** Ideal for note-taking, journaling, and work notes
**Size Options:** A4 (215mm), B5 (156mm), A5 (142mm)
**Additional Information:** Suitable for mathematical problems involving limits, convergence of sequences, and Taylor series expansions
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