... grid has many advantages,include:beauty,good strength,cauterization resistance,and rust resistance. 1.Ceiling T grids are made of galvanized steel ... has many advantages,include:beauty,good strength,cauterizationresistance,and rust resistance.3.Double -face or single-faced powder coatingheat galvanize zinc ... .25mm,0.28mm,to 0.30mm and 0.40mm T-bar