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flexible steeliness waterproof coupling:
1.novel structure and high yeild
2.displacement can be absorb
3.quality control
4.green product
5.packaging
| DN | Length | wall thickness | D | D1 |
| 50 | 380 | 300 | 60 | 177 |
| 70 | 380 | 300 | 73 | 190 |
| 80 | 384 | 300 | 89 | 217 |
| 100 | 384 | 300 | 108 | 236 |
| 125 | 386 | 300 | 133 | 257 |
| 150 | 386 | 300 | 159 | 280 |
| 200 | 386 | 300 | 219 | 350 |
| 250 | 388 | 300 | 273 | 402 |
| 300 | 388 | 300 | 325 | 462 |