Hand Vacuum Pump
The vacuum pump is made of durable plastic. It can easily provide a vacuum of 500mmHg by pumping its handle, the pumping rate of which is about 15ml per pumping. The pump itself is sealed and self-lubricated. By changing its working mode, the pump can be used to establish air pressure as high as approx. 2 atm. It is a must for middle and primary school laboratories.