Mini Vacuum Pump, DC 12V Vacuum Pump, 500Ma 5L/Min Stable and Reliable Water Pump, Used in Medicine, Gas Analysis Sampling, Instrument and Other Fields: Amazon.com: Industrial & Scientific
Amazon.com: ZENY 3,5CFM Single-Stage 5 Pa Rotary Vane Economy Vacuum Pump 3 CFM 1/4HP Air Conditioner Refrigerant HVAC Air Tool R410a 1/4" Flare Inlet Port, Blue : Automotive