White Rodgers AAE 2DA-01 Heat Exchangers A-SERIES THERMOSTATIC EXPANSION VALVE, EXTERNALLY EQUALIZED, 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