3-way 1" Aluminum Square Tube Connector (For Quick Frame-style tubes)

If you're building something out of 1" square aluminum tube, you can use this connector to put the extrusions together.

The hexagon stub is there to print without overhangs, and doubles as a cool looking bumper.

Places you can buy 1" square aluminum tubes that fit onto this connector:

-80 / 20
-Brunner Enterprises
-EZ Tube

I used these to make a printer enclosure for my TAZ 5. Photos of the full build here:
http://imgur.com/a/O3H5r