- NK-6500
- NK-6800
- NK-7000／NK-7100
- NK-7300／NK-7300E
- NK-7400
- NK-7500／NK-7600
／NK-7700 - NK-7800
- NK-7900／NK-7900E
- NK-8900
- NK-9000（Single）
- NK-14000
- D-FLEX
- F-FLEX
Bellows Expansion Joint
Bellows model
NK-7700 External Cylinder type Bellows Expansion Joint
| Number | Name | Material |
|---|---|---|
| 1 | Bellows | SS400,S25C,SUS304,316,316L |
| 2 | End Pipe | SGP,STPG370,SUS304,316,316L |
| 3 | Flange | SS400,S25C,SUS304,316,316L |
| 4 | Internal Cylinder | SUS304,SUS316,SUS316L |
| 5 | Ring | SS400,SUS304 |
| 6 | Neck Ring | SS400,SUS304 |
| 7 | External Cylinder | SGP,SUS304 |
| 8 | Suppotive Ring | SS400,SUS304 |
| 9 | Holder | SS400,SUS304 |
| 10 | Tie Rod Bolt | SS400,SUS304 |
