This is an extension used for weight lifting equipment. The one I have is able to do leg press, however I found it could hold a bit more weight disks so I made this extension. It should fit right in those pipes with a 25mm diameter. I printed the one I'm using with PETG 60% infill concentric pattern. Sliced with Cura.
On an Ender 3 S1 Pro with Sonic Pad it took around 1h30min.