Model No.           HR-371 Vacuum pump      140 â„“/min Scale range        5g /75kg Refrigerant          R-134a Tank capacity      21.7kg Power supply      AC220V 50/60Hz High quality visual pressure gauge. The large capacity recovery tank. (21.7kg DOT) The large capacity recovery compressor(HBP Type) and vacuum pump guarantee saving working time. Additional functions such as auto air purge function, automatic used oil discharge system, Recycle and Charge are contained.