The Munhwa B649A-71 is a professional-grade binder constructed by high-frequency welding premium PVC covers over a rigid hardboard core. This advanced manufacturing process ensures that the binder remains free from deformation even after years of use, providing a perfect shield against moisture and external contaminants. Designed for high-capacity archiving, it features a 2-inch D-ring mechanism, a rust-resistant spine finger ring, and a functional internal side pocket for maximum organizational efficiency.
- Advanced High-Frequency Welding: The PVC and hardboard are fused together to create a robust, water-resistant exterior that protects documents in any environment.
- Reinforced Spine Finger Ring: Equipped with a chrome-plated steel finger ring that allows for easy retrieval from shelves without damaging the spine, even when fully loaded.
- Functional Internal Side Pocket: Features a left-side pocket with ultrasonic welding and a thumb-cut design for smooth insertion of loose documents or lists.
- User-Centric Pocket Index: The high-transparency spine index is designed with extra space at the top for clear titling and color-coded categorization.
- Extra-Large 2-Inch Capacity: The 75mm spine width securely accommodates up to 400 sheets of A4 paper, keeping them perfectly aligned with a heavy-duty D-ring.

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