"We provide AAA AA A and B grade quality duplex board grey back. Suitable for any kind famous brand offset printer, for example HEIDELBERG, ROLAND, KBA, MITSUBISHI, LITHRONE etc. Excellent calandering, hot-stamping and laminating results. AAA AA GradeL 230GSM-500GSM, suit for 8 colors high speed printing, excellent printing result, and excellent stiffness. A Grade: 230GSM-500GSM, suit for 6 colors high speed printing, nice printing result, and nice stiffness. http://www.falcon-paper.net"