... -300mm5. Surface treatment:Plain,black finished,Zinc plated (Galv),Hot Dip Galvanized,Nickel,phosphate 6lack,DACRO coating,ect.7. Packing of HEX ... .MaterialLow carbon steel, stainless steel,alloy steelFinishBright,zinc,plated,hot-dip galvanized,mechanicl plating,black,dacroment etc.ColorNatural color,zinc color,blackSuperiorityEco ...