Photo 1 of CADUFUELLY 8" to 4" Duct Reducer Connectors for Ventilation Systems, Heating, Cooling, Ventilation Duct Fire Booster Adapter Fittings (?200-?110), Grey

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Photo 1 of CADUFUELLY 8" to 4" Duct Reducer Connectors for Ventilation Systems, Heating, Cooling, Ventilation Duct Fire Booster Adapter Fittings (?200-?110), Grey