
Having used this model of pump almost every day in my job for 43 years, I can confidently say that this model of air pump is bulletproof of all major makes and models and many lesser known to the public is Come. The "Stingerโ model from the same manufacturer, but imported, is far inferior to this model. I have used Enerpac, Blackhawk, Simplex and many other makes and models and none are as reliable and durable as the OTC 4020. I currently have 5 of these models in my business and rely on them on a daily basis.

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