Collars – Castellated
Fully insulated galvanised steel available in 150-550mm
Fully insulated galvanised steel. Allows for connection of round flexible duct to square sheet metal or Polypanel duct.
| Item # | Size (mm/inch) |
| 444005 | 150/6 |
| 444006 | 200/8 |
| 444007 | 250/10 |
| 444008 | 300/12 |
| 444009 | 350/14 |
| 444010 | 400/16 |
| 444011 | 450/18 |
| 444012 | 500/20 |
| 444013 | 550/22 |