Adapters are used as connectors between supply grilles or ceiling diffuser and return air grilles on one side and to the flexible ducts in the other side.
The connection to the flexible duct is either round or oval according to the size of the adapter.
The various sizes of the adapters are of the various sizes of our round grilles or for ceiling diffusers.
The adapters are manufactured by vacum forming and from
corrosion-resistant ABS engineer plastic material.