Comments About Print Files Please let us know if you have any comments/instructions about your print file(s). By default, we print objects with a 15% infill (which works well for many objects) and use supports when needed. Infill is how much internal support structure the print is given. An infill of 0% would produce a hollow object, and an infill of 100% would produce a solid object. The more infill, the heavier (and more expensive) the final print. Supports are print structures added to files to help the printer better process some portions of a print, and need to be removed from the print afterwards, often with tools. You will need to remove any supports from finished prints yourself.