... 2.300gsm C1S 3.several Heidelbergs with whole-new and advanced Color box printing packaging1.10 years factory experience2.300gsm ... printing,softcover book printing,perfect binding book printing,saddle stiching book printing and soon,also do all kind of paper box ,gift box, color ... paper box, display paper box ,corrugated paper box .rigid paper box etc, with series grade quality.