White Rodgers HFS 3-1/2SC-01 Heat Exchangers HF SERIES THERMOSTATIC EXPANSION VALVE, INTERNALLY EQUALIZED, 3-1/2 TON CAPACITY, REFRIGERANT CODE S (R-404A), CHARGE CODE C (MEDIUM TEMP), CAP. TUBE 60", 3/8" ODF X 1/2" ODF, STRAIGHT THRU BODY