{"product_id":"leuchtturm1917-notebook-a5-hard-cover-squared","title":"Leuchtturm1917 Notebook A5 Hard Cover, Squared","description":"A precise 5 x 5 mm graphing grid notebook for engineers, developers, technical designers, and mathematical researchers who need clean geometric structure for charts, algorithms, layout calculations, and architectural wireframes. The grid lines print in a discrete muted tone that guides without overpowering ink work. Thread-bound flat-lay hardcover, 80 g\/m² ink-proof acid-free paper, 251 numbered pages.\u003cbr\u003e\u003cbr\u003eFormat: A5 (145 x 210 mm) — 251 pages — 5 x 5 mm squared grid — 80 g\/m² ink-proof, acid-free\u003cbr\u003eBinding: Thread-bound hardcover — 180° flat-lay\u003cbr\u003eIncludes: Table of contents, 8 perforated sheets, 2 ribbon markers, elastic band, expandable rear pocket, archival stickers","brand":"Leuchtturm","offers":[{"title":"Default Title","offer_id":51784105197917,"sku":"4004117258381","price":4400.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/4405\/4621\/files\/Leuchtturm1917-Notebook-A5-Hard-Cover-Squared_All_2414_3.jpg?v=1718406283","url":"https:\/\/unfide.com\/products\/leuchtturm1917-notebook-a5-hard-cover-squared","provider":"UNFADE","version":"1.0","type":"link"}