Manhole Covers features : (1) Environmental protection (2) Saving mine resource (3) Longevity (4) Competitive price (5) Light weight (6) Nice appearance (7) Low noise Applications: (1) Electric power pipeling well;post,telecommunication,communication pipeline well; (2) Street lamp well,fire control well,all kinds of valve well; (3)City water,drainage pipeline well;heat supplied,gas well; (4)As cover board for anti-corrosion project,open ditch;it as well as can be made according to customers requirements.