MANHOLE RING
| Concrete Type | M400 | M400 | M400 |
| Diameter | 1.2 m | 1.2 m | 1.7 m |
| Inner Diameter | 1 m | 1 m | 1.5 m |
| Height | 1 m | 0.5 m | 1 m |
| Volume | 0.34 m³ | 0.17 m³ | 0.50 m³ |
| Mass | 820 kg | 410 kg | 1250 kg |
| Concrete Type | M400 | M400 | M400 |
| Diameter | 1.2 m | 1.2 m | 1.7 m |
| Inner Diameter | 1 m | 1 m | 1.5 m |
| Height | 1 m | 0.5 m | 1 m |
| Volume | 0.34 m³ | 0.17 m³ | 0.50 m³ |
| Mass | 820 kg | 410 kg | 1250 kg |
