This is the specially designed damper/duct connector that is supplied by original manufacturer for Broan and Nutone ventilation fans and heaters. It acts as an adapter allowing the unit to be connected to the duct shaft. This part is made from high quality plastic and it is sold individually.
This is an OEM part sourced directly from the manufacturer. The grille spring is designed for use in Broan heaters. This part is made of metal, and is used in securing the grille. You may require pliers when replacing this part. This item is sold individually.