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Update Frame for IS-338WH and IS-448WH - White.mn  Adapt the openings from your older speakers to work with ISA-338 & ISA-448 8" speakers.  Frame recess mounts into old speaker opening.  Uses IR-80 rough-in (purchase separately). Features wood construction.Item #IA-83WH Parts Catalog Nutone Parts Broan Parts Nutone Central VacuumParts Briggs & Stratton   IA-83WH Update Frame             Price $30.00