White Rodgers AA 1/2BA-02 Thermostatic Expansion Valve A-SERIES THERMOSTATIC EXPANSION VALVE, INTERNALLY EQUALIZED, 1/2 TON CAPACITY, REFRIGERANT CODE B (R-448A, R-449A), CHARGE CODE A (MED./LOW TEMP), CAP. TUBE 30", 1/4" ODF X 3/8" ODF STRAIGHT THRU BODY