Orders should be submitted with only one part per file. When a file contains multiple parts, we are unable to move them to optimize printing, which puts the print at high risk of failing/warping. Orders containing files with multiple parts will be sent back with a request that parts be separated and the order resubmitted.
But I want all my parts to ship together!
You can upload all your files to a single order and check them out together. This will ensure your prints are still part of a single shipment.
Here is an example of a cart with two files in it. Notice the black upload button below, where you can drag additional files. There is no limit to the number of files you can upload: