china school stationeryMore information for products BrandOUV Size A4, A5, A6,or customized accept Cover material 300art aper , cardboar , PU leather , hardcover kraft paper ( 70g,80g,100g,120g,150g,180g,200g,250g,300g,350g)inner material offset paper ,wood free paper ,stone paper (100g,120g and etc...)colorsPantone colors , 4 colors , CMYK ..