Variable diameter end plug connector: KQ2R
| Tube ΦD | Model | Joint External diameter φ | Joint Length L | Plug tube External Diameter φd | |
| L | L1 | ||||
| φ4 | KQ2R04-06 | 11 | 31.5 | 13.7 | 6 |
| KQ2R04-08 | 31.5 | 8 | |||
| KQ2R04-10 | 34.5 | 10 | |||
| φ6 | KQ2R06-04 | 13.2 | 32 | 14 | 4 |
| KQ2R06-08 | 34 | 8 | |||
| KQ2R06-10 | 36.5 | 10 | |||
| KQ2R06-12 | 39 | 12 | |||
| φ8 | KQ2R08-10 | 15.6 | 37.8 | 16.8 | 10 |
| KQ2R08-12 | 40.2 | 12 | |||
| φ10 | KQ2R10-12 | 18.8 | 43.5 | 18 | 12 |
