... # 1.soft top grain leather cover 2.solid hard wood frame 3.1+2+3 leather sofa 4.OEM 2012 hot ... -40/m3 for cushion, 30-35/m3 for backrest5> Wood Frame: * fully dried & anti-worm & polished treatment,with solid polished oak ... , * water content between 12%-15%,meet the international standard. * the inner frame is rather firm, and we mix spring & elastic & balance net ...