Sigel CO404 is the Conceptum Notebook, which is a high-quality stationery item designed for precision and reliability. This A5 portrait notebook features 97 squared sheets, offering ample space for technical documentation, detailed calculations, or schematic drawings, making it ideal for engineering professionals. The grey cover provides a professional aesthetic, while the squared pages facilitate structured note-taking commonly required in design and technical fields. Its robust construction ensures durability, supporting frequent use in both office and field environments. https://elecena.pl/product/29653961/sigel-co404-conceptum-notebook-squared-grey-97-sheets-a5-portrait 2025-12-29 https://elecena.pl/product/29653961/sigel-co404-conceptum-notebook-squared-grey-97-sheets-a5-portrait 2026-04-02