... cover Made of SMC or BMC composite meterial envirnomental and safe Product name:Manhole Cover.Brand Name:Dengrui.Size:700*50mm.Cover ... ,rich colors & cartoon design6, Anti-theft naturally (the iron product often be stolen)7,Low noise:Have no harsh noise8 ... water grate5,trench covers, manhole sets, well base, the water company covers, midori composite trench covers easy to handle, cost effective ...