... 3 mm21*12*43 mmWidely used in medical device, health mechanical, household appliances,etc.AJK-B1202 DC ... 3 mm27*12*42 mmWidely used in medical device, health mechanical, household appliances, etc.AJK-B2701DC 3V ... gas, draw water, applied in food preservation, medical device, water treatment, and so on.AJK ... mmStrong pressure pump, widely used in Humidifier, medical equipment, etc.AJK-B4006 DC 12V,24V300mA ...