Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4809749.

I use this to watercool my K40 laser, the piece is a pass through on a water bucket cover.

This is my first Freecad project, I'm still learning. I hope the FCStd file is clean enough.

It's compatible with flexible silicone tube ID 6mm x 8mm OD.