Classic Metal Defrost Timer 1)Model:DS-004 2)Good reliability 3)High quality, ... series, SC series)Rotary compressor for A/CCondenserThermostat(Ranco type, Danfoss type)Refrigerant gas(R22,R134a,R12,R406a,R502,R404a)Shaded pole ... start our business in an early day. Energy-Saving Defrost Timer