| | Cement manhole cover | Cast iron manhole cover | Magnesium the manhole cover | Playmer manhole cover | FRP manhole cover |
| Weight | 110kg | 130kg | 80kg | 50kg | 30kg |
| Resistance to diamantle strength | 15Mpa | 21Mpa above | 21Mpa | 21Mpa | 25.8 Mpa |
| Appearance | cement color | black ,rust | colorful light-colored | colorful unfast | colorful level off , smooth |
| life | 10years | 20years | 10years | 10years | 50years |
| Internal streng then marterial | half-round bars | No | Bamboo reinforcement | reinforced | rebar |
| usage | Easy happening drop hom cracked breakag gephenomenon | The high cost and the rust easy to steal | Reverse bittern bibulous easy weathering | Encounter heat too fragile encounter heat difficult open and aging | Security environmental protection becutify the environment the cost is low |
