ceiling grid light weight,good strength,cauterization resistant,water &fire resistant, passed ISO9001. ceiling grids1) Size (H x W):a) ... is a leading professionalmanufacturer of ceiling systems in China.Our main products are light gage steel joists, stoving varnish ... gypsum ceiling board.With the strength of light weight,cauterization resistant,water&fire resistant,we have passed ISO9001. ceiling grid