This is a 6-way connector, with three ports for 16mm test tubes, three ports for 10x13mm PVC tubing, a tunnel system inside connecting all, ventilation holes into the tunnels, and a couple of screws either side to attach the connector to a base, using these is optional though.

Prints fine in my case in PETG or PLA. Could also print with flexible but Ive not tested it.

The 16mm connectors arent super firm, but they are firm enough, a bit of blu tac might help but its not necessary.

WARNING: The ventilation holes on the top wont be suitable for smaller ants. Make sure to glue a wire mesh thats small enough for the species your using this with to make sure no escapees of tiny ants!

Screws: Designed for M2 screws, into wood