DiaryFlex are notebooks that feature interchangeable and replaceable content inserts. The 100 gsm natural white paper comes plain, ruled and dotted. Use as a sketchbook or notebook with fountain pens, pens, fine-liners or pencils. Books come with a robust cover, elastic closure and bookmark. Replace booklets out with any of the refill page types. 80 sheets and 160 pages per book and refill.