Sleeper
thingiverse
People need sleepers for those Thingiverse rails located here https://www.thingiverse.com/thing:4163348. One, four, and four people slept.
Download Model from thingiverse
With this file you will be able to print Sleeper with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Sleeper.