... to the customer's drawings or samples Material: Ductile iron manhole CoverFeatures:1) Moulding Process: green sand casting ... , resin sand casting 2) Materials: ductile iron3) Melting facilities: Electric Induction furnace ensures chemical ... , pipe fittings, valve body, fire hydrant, Manhole cover etc. We also supplygray castings as per the ... , QT600, QT700; HT250, HT300, TH350 Manhole Cover