- The End Cap is used for non-insulated spiral air ducts.
| Specs | D | H | t | a |
| 80 | 80 | 40 | 0.5 | 5 |
| 100 | 100 | 40 | 0.5 | 5 |
| 125 | 125 | 40 | 0.5 | 5 |
| 150 | 150 | 40 | 0.5 | 5 |
| 160 | 160 | 40 | 0.5 | 5 |
| 175 | 175 | 40 | 0.5 | 7 |
| 180 | 180 | 40 | 0.5 | 7 |
| 200 | 200 | 40 | 0.5 | 7 |
| 225 | 225 | 40 | 0.5 | 7 |
| 250 | 250 | 40 | 0.5 | 7 |
| 280 | 280 | 50 | 0.5 | 10 |
| 300 | 300 | 50 | 0.5 | 10 |
| 315 | 315 | 50 | 0.5 | 10 |