... steel,Hot-dipped Galvanzied Use:platform,ladders,floor drain,floor drain ISO9001 Steel Grating For Floor Drain Material:steel ... grating is made of low carbon steel plate,stainless steel plate,flat steel plate,etc Technique:steel ... , Q235, S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot ...