galvanized c purlin Size:C80-C180 Thickness:0.5-3mm Material:Q195-Q235 Specifications1.purlin aterial: color,zincalume,zinc 2. material:zinc275,q345, ... .shape width:any shape.Below is the brief introduction of C/Z purline(channel) for building use:1). Material: galvanized ... for installation convenience at building site.If you need C/Z purline(channel), (c Shape steel,z Shape, u steel Shape)..please ...