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I bought this unit: https://www.amazon.com/gp/product/B01L9WSTEG/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1 for my last car - not for fixing punctures, but for keeping pressure up to spec. Its special feature is that it shuts off when the set pressure is reached, so you don't need to shut off the pump, check the pressure, adjust the pressure up or down, recheck the pressure, etc., etc. It's also quiet and quick. $35 with Prime shipping.