Product Overview: The Biog Notebook A4 Folder Square 80 Sheets combines square-ruled pages with a folder-style design, ideal for organized technical work and document storage. Key Features: ‣ Square-ruled pages for precision in calculations and diagrams. ‣ Folder-style design for convenient document organization. ‣ A4 size provides ample space for detailed work. Specifications: ‣ Size: A4 ‣ Material: Premium square-ruled paper with a durable folder-style cover ‣ Quantity: 80 sheets