File formats for importing extrudable objects into SU

[Involute]

I have some objects in Illustrator I'd like to import into SU so I can add some thickness to them with the Push/Pull tool. Are there any formats SU recognizes that preserve this capability (and, hopefully, are supported by Illustrator for export)? Thanks.

[Dave R]

According to Adobe, you can export DXF and DWG which can both be imported into SketchUp Pro. You may or may not need to create faces after the import but since these are vector files, the edges will be usable.

[Involute]

Thanks.