It is just the FIller Guide that has the mount on both ends. This is useful for overhead feeders that span the top of your printer.
Made it cause I'm working on I made an overhead feeder for printing TPU in my Flashforge A5MP
Following HugoGs example, I was so happy to be able to download the STEP files, so I included them here too.
Also included 3DPNFilHoldRoller.stl file from original model
The author remixed this model.
Modified the Guide to be held from 2 sides