The unit came with oil that had spilled out of the motor from being upside down i would amazing there was oil everywhere inside were components Vevor told me dont worry we wipe the outside with gasoline its ok to use,WHAT! That makes no sense the filter ontop of pump motor was full of oil just a mess everywhere I literally think its a used machine,well I had to clean unit inside the best I could pushed air thru filter to get oil out of it ,I was so upset that I had to do all this cleanning maintenance on a new unit just ridiculas the oil was all over the cardboard it came with as well,tested unit and yes it worked but only after I did all this cleanning on all oil componets,,Vevor missed my point I should have gotten a brand new unit with no issues and one I didn't have to clean, I deal with commercial units in my field of repair,vacuum sealers so I know how they are supposed to arrive I as a business owner would have sent a new unit ,I just refuse to deal with Vevor they in my opinion are out of touch with the reality of my situation with no solving my problem other than go ahead and use it will be ok we wiped it with gasoline just rediculas ,