This is a plug for pipes (shaped metal). I would recommend when you make the 3D printing to use elastic polymer in order to compensate the difference in the thickness of the pipe. Before stuffing a plug in the pipe check the inside size of the pipe and the outsize surface of the stopper (make sure it fits)! If it`s necessary - correct the outside surface of the plug by taking away of the material on hand! I can generate a new file if you want. For that purpose it`s necessary to send me the product number of the detail you bought (product, article, art. №) and a plan (scheme) with the sizes you want at e-mail: email@example.com . As a facilitation use the applied .png file by marking the sizes you want. The price of the new file will be the same as also the number of the article which sizes you would like to be changed. If you want you can get the article in another file format (*.sldprt ; *.x_t ; *.wrl ; *.igs ; *.step ; *.prt) and the price can be negotiated.