Black Wire-O bound with a diameter of 1“ (25.4 mm), the large diameter allows to add features such as photos, the 55 sheets are protected by a 2 mm stiff paste board cover which is larger than the sheets, made in Germany. Natural white sketch paper with a rough surface featuring 130 gsm, lignin and acid free (pH value of 7.5 or above), ISO 9706 “long life”, no chlorine bleach (TCF). Suitable for all dry techniques, excellent pigment bond, also suitable for paintbrush drawings. The ?scalable“ travel book.