Summary

HobbyKing Spec FPV250 V2 Quad Copter
http://www.hobbyking.com/hobbyking/store/__52863__HobbyKing_Spec_FPV250_V2_Quad_Copter_ARF_Combo_Kit_Mini_Sized_FPV_Multi_Rotor_ARF_.html

This is a simple holder for 3mm led:s mounted in the arms.
It´s done in two parts for easier printing, glue them together or use acetone if printing ABS.