Type Voltage Free flow Max vacuum Max pressure Current Size CMP－11A 1.5－3V DC 0－0.5L/min －500mbar 600mbar 0.4A 17.5*26.5*36.5mm CMP－11B 3 V DC 3 L/min －700mbar 1 bar 0.7A 17.5*26.5*45mm