White Rodgers AA 1/2MZ-01 Thermostatic Expansion Valve A-SERIES THERMOSTATIC EXPANSION VALVE, INTERNALLY EQUALIZED, 1/2 TON CAPACITY, REFRIGERANT CODE M (R-134A), CHARGE CODE Z (LOW TEMP), CAP. TUBE 30", 1/4" SAE X 3/8" SAE, STRAIGHT THRU BODY