... strong enough,less flexible,high stiffness and quality Grey Paper BoardGENERAL SPCIFICATION 1. GRAM WEIGHT AND SIZE : 220G ... reasonable size also can be offered according to the paper mahine and your quantity .2.THICKNESS STANDARD : 0 ... end paperboard also can be used to make notebook paper, the cover of hardcover books, folders and albums, ... pic of the packing is below: mixed pulp Grey Paper Board