This is for a Guider 2 printer, it goes over the filament sensor on the back of the printer to allow a small ptfe tube to plug into the sensor so I didn't have to move the machine to reload filament. I ended up using the following parts to help hold the ptfe tube in place
https://www.amazon.com/dp/B0954Q2B6Z
https://www.amazon.com/dp/B0B6BP2D2K
https://www.amazon.com/Meters-White-Teflon-Bowden-Filament/dp/B01CUPV90M/139-5901056-3110639
https://www.amazon.com/dp/B08C9RZPMN