... :Q195, Q235 shape: C/U profiled surface: galvanized light steel keel 1, Usage: Ceiling partion 2, Function: Fireproof, Sound-Absorbing Description ... of Goods:1, Name : light steel keel2, Brand:TONGBAO3, Shape: C Profiled or U Profiled4, Color ... light steel main channel,75 stud,100 stud, 150 stud.50 track,75 track,100 track and 150 track light steel keel