Materials:Advanced hot-dropped galvanized steel Feature: 1,Fire-proofing、anticorrosive and durable. 2,the surface presses of veins help to firm the board Specification: Ceiling metal stub(steel channel): Supporting channel: Width(mm)*Height(mm)*Length(mm)*Thickness(mm) 38*10/12*(0.6~1.2)*3000 50*11/15*(0.6~1.2)*3000 60*20/27*(0.6~1.2)*3000 Covering channel: 50*12/16/17/18/19*(0.35~0.6)*2900/3000 60*24/27*(0.5~0.8)*2900/3000 Wall Angles: 23*23*(0.35~0.45)*3000 25*25*0.5*3000 30*30*(0.4~0.6)*3000 32*32*(0.4~0.6)*3000 20*20*30*(0.4~0.6)*3000 Dimension options available