... : 1.Metal builing material; 2.Easy to install Foreigh Trade light steel keel1 Advantages and features:1.Light,good strength,cauterization resistance ... .Moisture -proof,shock-resistance,high-effecient,environmentally-friendly and so on;4.Easy and fast for installation,time-saving;5.prompt delivery ... ,75stud,100 stud,150stud,50 track,75 track,100 track and 150track Foreigh Trade light steel keel1