**Product Specifications:**
**Brand:** Yujian
**Product Name:** Cowhide Paper Document Box
**Features:** Complete specifications, sturdy and durable, customizable, support for storage period, support for preservation period, multiple back widths available (2-6cm), full fund number, support for various institutions, starting and ending item numbers, etc.
**Material:** 680g domestic acid-free paper/674g imported wood pulp
**Size:** 31Ã22cm
**Spine Thickness:** 2, 3, 4, 5, 6cm
**Applicable:** Suitable for enterprises, government agencies, schools, offices, libraries, homes, hospitals, etc.
**Material Options:** Imported wood pulp paper (674g) and domestic acid-free paper (680g)
**Color:** Dark with yellowing, light with whitening
**Material Thickness:** 1-1.2mm
**Paper Weight:** 674g, 680g
**Characteristics:** Insect-proof, mildew-proof, non-deformable, non-fading
**Hardness/Flexibility:** Good hardness and flexibility
**pH Value:** Neutral paper with pH 7-8
**Storage Period:** 60 years, 50 years
**Printing:** High-definition printing, clear factory markings, high text recognition
**Craftsmanship:** Solid material with clear edges, one-time molding with adhesive lamination process
**Closure:** Elastic button not easy to fall off, convenient opening and closing
**Organization:** Side partitions for labeling and organized filing
**Capacity:** Large storage space with front and back compartments
**Additional Features:** Double spine for horizontal placement, national archive standard compliance
Please note that the specifications include details for both the 680g domestic acid-free paper and the 674g imported wood pulp paper options.