This is a holder for 1/3 index cards.

This is a holder for 1/3 index cards. I've designed it to identity the type of
filament.  A template is available for standard index cards on the main web page.

Support material is not required. It should be printed upright. Brim is
required. An infill of 20% is recommended.

This object's main web page is:  
http://www.ctheroux.com/this-is-a-holder-for-1-3-index-cards/.

This object was designed using Solid Edge Community Edition.

You can request the source files on the page listed above.