Book 424, lined. Number of sheets 20. This notebook was developed based on our philosophy of proven quality. It is made of unique paper that meets the strictest criteria for functional properties. The workbook arose from cooperation with schools in the Czech Republic and fully meets all school requirements for constant quality. An added bonus are the trendy designs of the front pages. Meaning of number 424: (4) – format A4 (2) – number of sheets 20 (4) – lined