tommasoconti98

Hi to everyone, I have a problem with the following file. I am trying to print this thing, but the round objet in the highest part, doesn't show up in the preview section (it is transparent) and I can't find a way to print it. I have attached the .stl file and two photo, one in the prepare section (where I see the object) and on in the preview section (where it became transparent). There is someone who can help to to solve this? Thanks Crazy cart.stl