White Rodgers NBE 1/2ZAA-05 Emerson NXT SERIES THERMOSTATIC EXPANSION VALVE WITH ADJUSTABLE SUPERHEAT, NO CHECK, EXTERNALLY EQUALIZED, 1/2 TON CAPACITY, REFRIGERANT CODE Z (R-410A), CHARGE CODE AA (WIDE RANGE), CAP. TUBE 30", 3/8" ODF X 3/8" ODF, BLEED 15%, STRAIGHT THRU BODY