... FrameNow we have developed smc composite manhole cover: Composite sewer Covers, Circular Manhole Covers, Square Manhole Covers, ... Installations, Beautification of Gardens and Landscapes. JINMENG Composite sewer covers can be used for roadside water entrance chambers, ... for swimming pool applications also. Advantages of the composite sewer covers:100% waterproof, Weatherproof, Corrosion free material. ...