Manufacturer Name: Johnson Controls Product Number: AFS-222 OEM Part Number: AFS-222 Product Description: Air Flow Sw,Adj .05-12" 1/4"Od Weight:1.19lbs/539.77g Johnson Controls AFS-222 Air Flow Switch Adjustable is highly Essential component in HVAC systems used to control air flow and performance. This occurs by measuring fluctuations in air pressure in the ducts, and turning ... https://www.partshnc.com/afs-222-johnson-controls-air-flow-swadj-05-12-14-od