DUCTILE IRON TRENCH DRAIN GRATING Load Class: EN124 B125,C250,D400 Lenth: 500MM,600MM, ... : 100MM,150MM,200MM etc EN1433 Ductile iron castings of drainage channel gratingMaterial: Ductile iron GGG50 (500-7)MOLDING: DISA LINELoading Class ... , D400Lock type: Stainless Steel bolts & nutsframe: Concrete or Polymer Concrete Channel, or PVC Channel.MOLDING BY: DISA MOLDING LINE, 120 box/h