Type A Air pump:
Outer diameter of Air inlet: 4.2MM
Outside diameter of Air outlet: 4.2MM
Pump weight: 16g
Voltage: DC3V
Pumping current: 0.58A
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Type B water pump:
Outside diameter of water inlet: 3.5MM
Outside diameter of water outlet: 3.5MM
Pump weight: 16g
Voltage: DC5V
Pumping current: 0.28A