OPTIMAL PAGE SIZE - Perfectly sized at 7x4 inches, this refill fits seamlessly into your Hahnemuhle Flex Diary, making it ideal for on-the-go notes and sketches. SUPERIOR PAGE QUALITY - Experience smooth writing on 100 gsm paper, crafted for minimal bleed-through, ensuring your notes remain crisp and legible every time. ACID-FREE ARCHIVAL - Preserve your important entries with acid-free paper, designed to prevent yellowing and degradation over time, keeping your memories intact. ENHANCED DURABILITY - Each refill contains 80 sheets (160 pages) of robust paper, capable of withstanding daily use, providing a reliable writing surface.