polystyrene wall panel: made from two layers of colored steel sheets polystyrene insulation inside GB,JIS,ASTM prime quality polystyrene wall paneEPS sandwich panel1. thickness: 50mm, 75mm, 100mm2. Insulation foam: eps, pu, rock wool.3. color: blue, white, red.eps sandwich panelMaterials:1. Structure:a) Upper and lower layer: uses Colored metal sheetsb) Middle: condensed polystyrene foam board2. ...