- 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-9000 Square Bellows Expansion Joints
Round corner model
