Quercetti Marble Run Connector

This is a connector piece for connecting tubes used in the Quercetti marble run kits. There are two types of connectors; one with supports that prints out a nice divider between the tubes, and one that doesn't have supports that just has a little raised part that stops the tubes from meeting. The latter connector only takes about 20 mins to print.

They fit snug but not so much that a kid can't get them in and out on their own.