The ductile iron manhole tops are largely used in the construction of city project inside or abroad the country. Such as the road, park, square. They also apply for drainage engineering, power supply project and telecom communication project. A complete range of the innovative channel drainage systems cover all application types from domestic usage through to industrial, dock or airport usage. Ductile Iron manhole covers are manufactured to BS EN124. Our factory can design the drawing according to the customers' description to meet their need. Also they can produce according to the drawing which customer supplied. The following is that we supplied according to our customers' request.