Barn Door Roller (608 Bearings) for 1/2" IPS

I wanted a cheap solution for a barn door for my kids playhouse.
I had some 608 Bearings lying around. 
So I mocked this up quick. Made to ride on ½ iron pipe. 

They're gleefully simple. There is something similar for sale on the amazon.
But this is the age of instant gratification! So I used my 3d printer. 
printed in white ABS. 
They have been working well :D

I've included a single bearing or double bearing design. 
(Note: I've only printed and employed the single bearing version.)
 

***Edit (3/29/22) 

I redrew them so the middle will be thicker. (find files with -Thicc)
I had one break after being outside all winter…
This should fix that.
Also added a fusion360 file.

Enjoy!