... , lether cover notebooks, kraft cover spiral notebook, soft cover notebooks, hard cover notebooks, PP spiral notebook, PP cover notebook, PU cover notebook, ... : Any size.2. Inner material: Free wood paper, offset paper, artpaper, etc.3. Cover material: Artpaper, Cardboard, PVC film, ... etc.4. Printing: 1-6 colors.5. Cover surface process: soft cover/hard cover, embossed, UV, PP, PU, glossy lamination ...