cast iron Manhole Cover 1.material:ductile iron/cast iron 2.EN124 D400 3.opening size:600mm 4.OEM service Ductile Iron round Manhole Cover1) production standard: EN124 from A15 to F9002) Material: grey iron, ductile iron,3) Type:round type and Square type,triangle4) Sand casting, 5).class: A15 B125 C250 D400 E600 F 900 6).shape: round rectangle 7).OEMservice