Skoocom High Vacuum Air Pump 
Model SC5002PM 
12VDC, 1 Amp
<- 80KPA of vacuum
> 200KPA max pressure
airflow 10L/min
72dB noise
leakage < 85 (from 0 to 200mm Hg in a 100cc tank).
This pump is made for health care, atomizers, etc. Barbs are made for 1/4" diameter tubing.
Size 2.6" long x 3.5 tall x 1.58" wide.