This is a case for the USB tester combo board by Fried Circuits. That boards comes as a bare PCB and when you don't need all the test points, this case packages it up nicely.

If you don't have a printer that can print this properly (FDM might not work), you can order one at https://www.shapeways.com/shops/liyanage. The model is offered there with no markup on top of the Shapeways price.

Formlabs

Form 1

Yes

0.1mm

Printed with Clear v2 resin

Designed in Fusion 360, you can view/download the original model file at http://a360.co/2ekRtXM