Accessories for duct or pipe to transform from any circular diameter duct to any rectangular duct.
In our warehouse, we have already available stock to be sent with hoppers adaptable to the most common ventilation boxes. From 7/7 to 22/22 and from 10/5 up to 25/13.
The hoppers for the ventilation boxes are built with a 25mm tab to facilitate the adaptation and for a better sealing.

Technical Data Sheet