| Round type Ductile iron manhole cover | |
| Size(inner circle/outside circle) | load-bearing |
| 500×600 | 10tons,20tons,40tons,60tons |
| 600×700 | 10tons,20tons,40tons,60tons |
| 700×800 | 10tons,20tons,40tons,60tons |
| 800×900 | 10tons,20tons,40tons,60tons |
| Customized size,customized logo | acceptable |
| square type Ductile iron manhole cover | |
| Size(inner frame/outside frame) | load-bearing |
| 320×320 | 10tons,20tons,40tons,60tons |
| 400×400 | 10tons,20tons,40tons,60tons |
| 500×500 | 10tons,20tons,40tons,60tons |
| 600×600 | 10tons,20tons,40tons,60tons |
| 600×800 | Customized size,customized logo |
| 800×1200 | Customized size,customized logo |
| Etc… | |
| Customized size,customized logo | acceptable |
