Ductile iron manhole cover 1)ductile iron QT400/18,QT450/10, ... iron:HT150,HT200,HT250,D400,E600,F9 Ductile iron manhole cover 1)ductile iron QT400/18,QT450/10,QT500/7 ... Class B125, C250, D400, E600, F900 meeting the relevant EN124, BVQI and Australian standards 4) Form and Sizes available: ... to 1200mm 5) Certificate of Approval: BVQI, LRQA, EN124 Packing: Iron or wooden pallet 5) Certificate of Approval: ...