This notebook refill provides an exceptional writing experience and is compatible with a variety of pens, including fountain pens, ballpoint pens, pencil, and more. The paper is designed to resist ink bleeding and show-through, while providing excellent stiffness for a premium writing experience. Features -Color:Assorted Color -Material:Paper -Size:17.20X10.00X0.50cm/6.76X3.93X0.20in -Note:Each book includes 40 Sheets of inserts. -Made from high-grade materials and smooth math, this practical notebook refill gives you a unique feeling. -This notebook refill is workmanship practicability and durability. You can write whatever you want. -The craftsmanship of this notebook is light, strong, and easy to use. Easy to store, carry and bind. -You can use this writing paper to write your papers, diaries, reports, excerpts, etc in daily use. -Turn the loose-leaf directly into the inner page, this notebook refill is very convenient to use. Package list: 9 x Books of Notebook Refills