OPTIMUM CONSTRUCTION MATERIALS GROUP, is  supplier, manufacturer and exporter of building material, inner decorative material, refractory material with self factories from China, offer a variety of quality materials at value pricing. Our mainly products include: Calcium silicate board or partion,Calcium silicate ceiling tiles, Mineral fiber ceiling tiles,PVC gypsum ceiling tile, Megnisium Oxide board or MGO board, Paper faced Gypsum wall panel or partion, Steel suspended keels include T grid and U grid,stud,runer, Accessories,Compound sealing spacerand so on, our all group products exported by our own professional export company-SHIJIAZHUANG MAINLAND CO.,LTD.