The manhole covers is very well causticity-resistance ,which are applied used more and more in petroleum, chemical, metallurgy

we use the new type of composite material that is the earliest one in guangdong province.These material is the best alternative of Cement, steel.They have the following characteristics:

1.Environmental protection  non-toxicity raw material

2.Longevity  10-15years

3.Features  anti-corrosion,anti-rust,anti-abrasion, excellent anti-pressure capability. Insulated electric and high-temperature.

4.Competitive price  lower than stipulated standard cast iron one.

5.Light weitght   1/3 lighter than cast iron ones.

6.Nice appearance   Not only is sewage products, but also a kind of art.