White Rodgers AAE 1/2DA-01 Thermostatic Expansion Valve A-SERIES THERMOSTATIC EXPANSION VALVE, EXTERNALLY EQUALIZED, 1/2 TON CAPACITY, REFRIGERANT CODE D (R-450A, R-513A), CHARGE CODE A (MED./LOW TEMP), CAP. TUBE 30", 3/8" ODF X 1/2" ODF STRAIGHT THRU BODY