making the ceiling grid,A)main tee:38*24,32*24,30*24,B) ... :24*24,22*22,Thickness: 0.2-0.4mm ceiling grid;materials:TDC51D+Z\TSGCCA);metric, lenght 3,600mmimperial,lenght 3 ... )Usage:Together With Mineral Fiber Board Used To Make Ceiling For Office, Shop, Hotels, Restaurants, Theatres And So On.5)Year ...