A4 NOTEBOOK WITH 1 COLOR STRING. 80 micro-perforated sheets for clean start and with 4 holes for filing. SHEET SIZE: 210 x 297 mm (A4). Extra Opaque PAPER 70 g/m² and excellent quality. It manages to prevent the ink from passing through, and thanks to its quick drying, its irradiation also stops. INNER STRIPING IS 5mm QUADRICULATED with header for titles. High quality offset printing of scratch achieves greater subtlety and cleanliness, highlighting writing, facilitating reading and studying. EXTRA HARD CARTON COVERS for strength, consistency and greater durability. CONTINUOUS SPIRAL with COILOCK system that allows you to open in the plane of the notebook, in addition to turning around and avoiding engagements. MADE WITH SUSTAINABLE PAPER. It is FSC MIX CREDIT certified ensuring that paper comes from environmentally sustainable forests. Made in Spain.