We are offering used suction machine. 1, power consumption: 120 w2, maximum negative pressure: 0.09 mpa3, negative pressure range: 0.02 mpa to max negative pressure4, pump rate: 20 l/min5, noise: 60 db6, bottle volume: 1500 ml, 1 pcs 7, continuous working time: 0-30 minrest time 30min