- The End Cap is used for insulated spiral air ducts.
| Specs | d | D | H | a | t |
| 80 | 80 | 110 | 25 | 5 | 0.5 |
| 100 | 100 | 140 | 25 | 5 | 0.5 |
| 125 | 125 | 155 | 25 | 5 | 0.5 |
| 150 | 150 | 180 | 25 | 5 | 0.5 |
| 160 | 160 | 190 | 25 | 5 | 0.5 |
| 180 | 180 | 210 | 25 | 7 | 0.5 |
| 200 | 200 | 230 | 25 | 7 | 0.5 |
| 225 | 225 | 255 | 25 | 7 | 0.5 |
| 250 | 250 | 280 | 25 | 7 | 0.5 |
| 300 | 300 | 330 | 25 | 7 | 0.5 |
| 315 | 315 | 345 | 25 | 7 | 0.5 |
| 350 | 350 | 380 | 25 | 7 | 0.5 |
| 355 | 355 | 385 | 25 | 7 | 0.5 |
| 400 | 400 | 430 | 25 | 7 | 0.5 |
| 450 | 450 | 480 | 25 | 7 | 0.5 |
| 500 | 500 | 530 | 25 | 7 | 0.5 |
