Sigel CO402 presents the Conceptum Notebook, a squared notebook crafted for precision and organisation. Designed to cater to engineering and technical environments, this A5 portrait notebook comprises 97 sheets, offering ample space for detailed sketches, calculations, and notes. The squared ruling facilitates both structured data representation and freehand illustrations, enhancing its utility for technical drawings and design work. Suitable for professionals requiring consistent and systematic documentation, the blue cover provides a durable and stylish exterior, ensuring its reliability in field work and office settings alike. https://elecena.pl/product/29653963/sigel-co402-conceptum-notebook-squared-blue-97-sheets-a5-portrait 2025-12-29 https://elecena.pl/product/29653963/sigel-co402-conceptum-notebook-squared-blue-97-sheets-a5-portrait 2026-04-02