... steel frame,steel ceiling and drywall systems,Used in construction engineering.export: Australia, Malaysia, Indonesia, Thailand, Philippines, dubai, Brazil ... , Colombia, Bolivia, Italy, Chile, France...steel ceiling:Main channel:25x21x0.75mm,38x12x0. ... .45mm, 68x35x22x12x0.45mm,70x35x40x12x0.45mm,80x50x22x12x0.5mm steel stud:1,Size 40*35mm,50x35mm, 70x35mm, ...