altman_fixtures.dxf (2,789.8 Kb)Download  Click on the above Download button to download the Altman_fixtures.dxf block. AutoCAD DXF (Drawing Interchange Format, or Drawing Exchange Format) is a CAD data file format, developed by Autodesk as their solution for enabling data interoperability between AutoCAD and other programs. Altman Lighting is not responsible for sizing errors.