Be prepared for any duct size from 6" thru 14".
Stock the Universal Collar Kit and reduce prep time, install time and frustration.
Reduce Inventory
- Stock one neck size - 14"
- Scales down 14" neck to 6", 8", 10", or 12"
- Sold alone (#4995-NRD) or in kits with 14" neck diffusers or 14" neck filtered air returns.