C steel, C steel purlin, C section, C purlin C Steel Purlin!. Thickness:1.0-4.0mm optional2. Surface preparation: H.D.G, Pre-galvanized, electrogalvanized, cold rolled3. Length: according to your demands4. stainless steel is also available, thickness is limited to 8mm5. High strength, light weight, high reliability. C Steel Purlin