Etonm Motor entered Air Pump(DC Pump, Mini DC Pump, DC Air Pump) Industry for 6 years, However, designed and developed 6 series of DC Air Pump, there are ET-AP12, ET-AP13, ET-AP27,ET-AP33, ET-AP36, ET-AP60. Every series has several types. Type: ET-AP12 Voltage: 3V-6V Flow: 0.8-1.2LPM Pressure: 350mmHg Noise: 60dB max Design: drived by DC brushed Motor Materials: Plastic and rubber (may have mixture) Application: Blood pressure monitor (BP monitor pump), massager (Face, eyes, Head, and waist massage), medical-care equipment and appliance.... we can customize the pump, if you have any question about the pump, please feel free to contact us, your inquiry will be welcomed.