Maximize The Air And Sound Performance Of Your Best Range Hood Using One Of Our Wide Variety Of Ducting Accessories. (Ul)(Li)Overall Size Showing On The Surface Is 9" Square With A 5-1/2" Hood And A 1-1/4" Long Attachment Collar For 6" Round Ductwork (Not For Use With Dryer Venting)(/Li)(Li)Designed For Use With Make-Up Air Inlet Applications (No Backdraft Damper)(/Li)(Li)Wall Cap Is Made Of 0.025 Aluminum With A Natural Finish For Durability And Long Life(/Li)(Li)Sold As 1 To A Carton(/Li)(/Ul)