CI Manhole Cover marketed by us is designed and manufactured by making use of premium-grade raw materials and upgraded technology. It is a vital tool for masonry and drainage system maintenance. This is our most popular concrete manhole product because it is easy to install in new and existing concrete structures. CI Manhole Cover is made of polypropylene, which demonstrates its resistance to strong sulphuric acid. This cover is very effective as well as economical and safe to use.