This frame is a derivative from the WB85-8520-DSF3FC frame. It shares exactly the same geometry and component list except the motors. Here smaller 7mm 14kV brushed motors (https://goo.gl/uFlFG5) are used. This choice further reduces weight of the micro quad. The building instructions are the same compared to WB85-8520-DSF3FC, therefore only the link to the STL data will be given here.
Frame comparison - WB85-8520-DSF3FC for 8.5mm motor (left) and WB85-0720-DSF3FC for 7.0mm motors (right).