Greenheck CRD-1-6x6 Ceiling Damper

Kele 1” Non-Mercury Damper end switch TS1-475 (Shelf stock, moving, must sell)

Kele 1” Non-Mercury HVAC Damper End Switch TS1-475 ~ NOS

Durable 5 Inch Galvanized Steel Backdraft Damper for HVAC Ventilation Systems

Kele 1” Non-Mercury HVAC Damper End Switch TS1-475 ~ NOS

2pcs Backdraft Damper 6" Ducting Hose Airflow Insert Backflow Preventer Shutter

TS-475 Non-Mercury Damper End Switch NEW - Lot of 2