The End Cap is used for insulated air ducts.
| Specs | d | D | H1 | H2 | a |
| 80 | 78 | 110 | 25 | 33 | 5 |
| 100 | 98 | 130 | 25 | 33 | 5 |
| 125 | 123 | 155 | 25 | 33 | 5 |
| 150 | 148 | 180 | 25 | 33 | 5 |
| 160 | 158 | 190 | 25 | 33 | 5 |
| 180 | 178 | 210 | 25 | 33 | 7 |
| 200 | 198 | 230 | 25 | 33 | 7 |
| 250 | 248 | 280 | 25 | 33 | 7 |
| 300 | 298 | 330 | 25 | 33 | 10 |
| 315 | 313 | 345 | 25 | 33 | 10 |
| 350 | 348 | 378 | 25 | 33 | 10 |
| 355 | 353 | 398 | 25 | 33 | 10 |
| 400 | 398 | 438 | 25 | 33 | 10 |
| 450 | 448 | 478 | 25 | 33 | 10 |
| 500 | 498 | 528 | 25 | 33 | 10 |