... /m² (both sides)Surface finishregular spangle, mini spangleGradeSGCC (DX51D+Z), SGCD (DX52D+Z), DX53D, DX54DQuality standardJIS G3002 GB/T251BApplication fields: (1)Construction ... smoke tubes, pipes, mechanized refrigerated warehouse, etc. SPCC Zinc Coating 50-270g/m2 Galvanized Steel Trip