Square Ductile Iron Manhole Cover,600*600 1,Material:ductile iron 2,EN124/D400 3,Clear opening:600mm 4,Frame size:850mm Square Ductile Iron Manhole Cover,Ductile Cast Iron Manhole Cover Manhole CcoverEXPORT DUCTILE IRON MANHOLE COVERMaterial:ductile ironSize:850mmHeight:100mmWeight:58kgShape:round Pressure:D400Standard:EN124Packaging:pallets and plasticService:OEM