About Product:Resin manhole covers replace cast iron manhole covers, Resin manhole covers have the covers of light weight, high strength, excellent fatigue resistance, damage safety, simple clinic, Low rolling noise, good chemical corrosion resistance, Good acid and alkaline to hold the and beautiful appearance. Its comprehensive performance and economic indicators have exceeded cast iron manhole covers, And can also solve the problem of cast iron manhole covers stolen. It can also reduce the consumption of resources and has important economic and social value.