White Rodgers AA 1/2SZ-06 Thermostatic Expansion Valve A-SERIES THERMOSTATIC EXPANSION VALVE, INTERNALLY EQUALIZED, 1/2 TON CAPACITY, REFRIGERANT CODE S (R-404A), CHARGE CODE Z (LOW TEMP), CAP. TUBE 60", 1/4" ODF X 1/2" ODF, STRAIGHT THRU BODY