Trade-Wind Trade-Wind Duct Silencer for 8" Round Duct

Features:Designed with a perforated lining and diffuser material that provides noise absorption for Trade-Wind (and other brands) in-line and remote mount ventilatorsShipped permanently assembled and contains no moving parts for operationCan be mounted at any angleSpecifications:Width: 7-7/8"Height: 23-5/8"