Manual Breast Pump (HL-0613) Product feature : The silica gel which has massage function can suck out a great deal of breast milk in a short time, and also can elieminate the gall and ache of the breasts during the feeding period. The breast pump can suck quickly, comfortably. The mothers can control and choose the suction’s speed according to their comfortable condition. it can be used with varies sizes of milk bottles. Easy to use, convenient to operate. Safe, comfortable, hygienic, don’t comprise poisonous chemic material. Material: PP , silica gel Technique parameter Stimulation phase: 0---150mmHg 0---20KPa Expression phase: 0---230mmHg 0---31KPa.