White Rodgers AA 1/4BA-02 Heat Exchangers A-SERIES THERMOSTATIC EXPANSION VALVE, INTERNALLY EQUALIZED, 1/4 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