CBP - Commercial Back Pressure APPLICATION, R404/R507 Refrigerant, 115V 1 Phase 60Hz / 100V 1 Phase 50Hz 1/4 HP, High Start Torque (HST) 2791 BTU Capacity, 0.375" Sweat (3/8" ODF) SUCTION LINE SIZE, 0.25" DISCHARGE LINE SIZE, Reciprocating Compressor (Model:AKA9427ZXA)