1.galvanized,painted,depend on your requirement 2.ISO9000-2000 3.apply in stair tread, trench cover.ect 4.all specifications (1)Grating Surface Treatment:Hot Dip Galvanized,painting,self colour/untreated (2)Grating Application:Industrial platform,floor (1)Grating Main Market:USA,AUS,UK,Kuwait,South America(2)Grating Products Scope:Steel grating,smooth&serrated,trench cover,stair tread(3)Grating ...