400x400mm square manhole covers D400

Our plastic square manhole covers don’t have recovery value, which can solve the stolen problem thoroughly.

Our composite manhole covers are of high load capacity, which exceeds the ductile iron.

We could produce any free design for our plastic manhole covers surface, which could be designed according to customers’ demands, including color, pattern, specification.

The service life of our plastic (composite material) well lid is at least 30 years.

Our plastic manhole covers are well sealed, which can be used hermetically, and effectively prevent those poisonous gases leaking out from the cesspool.

Our square composite manhole covers are neither jangle nor rebound when cars pass through.

Our plastic square manhole covers have good wear and corrosion resistance, which will never rust because it has good wear and corrosion resistance.