3"-5" Backdraft Damper ABS Flexible Airflow Inline Backflow Duct Adaptor

3" Duct Connector Flange, 4 Pack Exhaust Hose Flange

2 Set 3" 4" 5" Backdraft Damper ABS Flexible Airflow Inline Duct Adaptor Draft

1 Set 3"-5" Backdraft Damper ABS Flexible Airflow Inline Backflow Duct Adaptor

3" HVAC Duct Manual Volume Damper Steel Flame Airflow Backdraft

2 Set 3"-5" Backdraft Damper ABS Flexible Airflow Inline Backflow Duct Adaptor

3/4” VIEGA 79595 ProPress TEE P X P X FPT Copper Pipe Press Model 2917.2ZL

2Pcs 3-Inch HVAC Duct Manual Volume Damper Airflow Backdraft Damper Control