Four way tube connector joint 12mm diameter, 90° angle

Four way tube connector joint 12mm diameter, 90° angle. 

Part of the system for creating spatial structures. Here are the other parts:

https://www.printables.com/cs/model/740026-four-way-tube-connector-joint-12mm-diameter-90deg-

https://www.printables.com/cs/model/731586-three-way-tube-connector-joint-3_45

https://www.printables.com/cs/model/740023-three-way-tube-connector-joint-12mm-diameter-90deg

https://www.printables.com/cs/model/741236-five-way-tube-connector-joint-12mm-diameter-90deg-

Have a fun and share your prints!