This stone PP hard cover spiral notebook features a durable hard cover made from 50% polypropylene (PP) and 50% calcium carbonate with a sturdy 2mm thickness. Inside you'll find 70 sheets (120 pages) of eco-friendly stone paper. Designed with convenience in mind, this product features an elastic band to securely hold a pen. While the STP001 isn't included, it complements the design perfectly. This notebook is perfect for everyday use combining durability with environmental responsibility and offering a smooth writing experience ideal for students professionals and creatives alike. NFC is available as an optional add-on for this product.