... various kinds of castings such as farm tractor parts (gear box casing, differential casing, wheel ballast, etc.), auto parts, construction and ... engineering machinery parts, pipe fittings, valve body, fire hydrant, Manhole cover etc. We also supplygray castings as per the customer's ... number including: QT400, QT500, QT600, QT700; HT250, HT300, TH350 Manhole Cover