| Jiujing brand high strength composite products | ||||
| Square manhole cover | model | Weight (kg) | ||
| Diameter * cover thickness (mm) | lid | bottom | set | |
| 700*700*50 | heavy | 36 | 14 | 50 |
| 700*700*40 | light | 25 | 12 | 37 |
| 600*600*50 | heavy | 26 | 10 | 36 |
| 600*600*40 | light | 16 | 7.5 | 23.5 |
| 500*500*50 | heavy | 26 | 15 | 41 |
| 400*400*50 | heavy | 16 | 9.5 | 25.5 |
| 250*350*30 | light | 5 | 4 | 9 |
| 300*300*40 | heavy | 7.5 | 5 | 12.5 |
| 450*450*40 | heavy | 10 | 7 | 17 |