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Amazon.com: SPECSTAR 110V 1/4 HP 3.5 CFM Single Stage Rotary Vane HVAC Air Vacuum Pump for R12 R22 R134a R410a Systems 330ml Oil Included : Automotive
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News - What is the difference between a single stage rotary vane vacuum pump and a double stage rotary vane vacuum pump?
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BENTISM 8CFM Two-Stage Rotary Vane Professional Vacuum Pump (15Micron, 1HP, 1/4"flare 3/8 SAE 1/2"ACME inlet) - Walmart.com
![News - What is the difference between a single stage rotary vane vacuum pump and a double stage rotary vane vacuum pump? News - What is the difference between a single stage rotary vane vacuum pump and a double stage rotary vane vacuum pump?](https://www.eastvac.com/uploads/0021.jpg)