I tried 3 other vacuum pumps (3rd party fakes) before finally settling on this one. It's very quiet and works well. If it crashes or has problems I'll update it, but so far it's perfect. Definitely an OEM refurbishment which is your best choice for cheaper functional replacement. DO NOT make the same mistake I did and buy cheaper fakes. they sound like an air compressor for bikes/basketball etc and only last a few weeks. It's a low hum, dies out quicker, and hasn't caused me any problems so far.
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