White Rodgers AAE 3-1/2BA-05 Thermostatic Expansion Valve A-SERIES THERMOSTATIC EXPANSION VALVE, EXTERNALLY EQUALIZED, 3-1/2 TON CAPACITY, REFRIGERANT CODE B (R-448A, R-449A), CHARGE CODE A (MED./LOW TEMP), CAP. TUBE 30", 5/8" ODF X 7/8" ODF STRAIGHT THRU BODY