White Rodgers NB 1MC-01 Thermostatic Expansion Valve NXT-R SERIES THERMOSTATIC EXPANSION VALVE, REFRIGERANT CODE M (R-134A), CHARGE CODE C (MED. TEMP), 1 TON, 3/8" X 1/2" ODF STRAIGHT THRU, SUPERHEAT ADJUSTABLE, NO INTERNAL CHECK, INTERNAL EQUALIZER, NO BLEED, CAP TUBE 30"