The proprietary Aircell Polymer neck reducers for the Aircell Grilles are designed for quick and easy connection to ductwork and snap-fit over the terminal direct or over the damper.
They are made of Black ABS engineering polymer, with the same fire-resistance and non-corroding characteristics as the Aircell Terminals and Dampers.
Please note that these product properties are not a replacement for the manufacturer's literature and it is always recommended that Waterloo Air Products plc is consulted before specifying.