... ,000 tons of gypsum and 30 million square meters of top grade paper faced gypsum ... got the certificate of ISO9001: 2000, the national fire---proof, environmental friendly certificate and the ASTM (USA ... to 15.9 Features: white paper-faced , square edge and tapered edge Packing:in container, by ... in container ,by hand Features :green paper-faced , square edge and tapered edge Packing :in container ,by hand ...