Download the quick guide.Unit:
|Outer Diameter :||Aperture|
|Inner Diameter :||Central Obstruction|
Download using upper buton or copy following source text and save as
[maskName].svg using text editor, and open it by inkscape.
If you want a DXF file, you can export the DXF with Inkscape's "Save As".
Provided, to maintain scale,
you should change the base unit to "mm" or "in" in the options dialog that appears.