Hello there is ellen from Linyi xinyuanlida building material co., ltd , our company is manufacture of the ceiling T grid, light steel keel;T type sprayed joist, groove sprayed joist;grille ceiling;ceiling board;wall materials etc.series ***** product matches national standard, and have the watertightness, obstruct bum, soundproof, the anti-is aging, through into the heavy duty characterstics, popular national every locality and overseas. We have exported south africa and Middle east and so on. warmly wait your reply best regards ellen e-mail:ellen-1203(at)163 dot com