Paint roller adaptor caps (4 to 8 mm)

Annoyed by all the different paint roller handle sizes?

I was when I had already 4 different roller handles and ended up needing a 5th one for the new rollers we bought.

So I just made end caps to hold rollers on smaller sized handle's (smaller diameter rods).
They take ~5 to 11 min to print.

Usage :
I used hot glue to stick the end caps on the rods. (put some hot-glue inside the printed part. Can be removed by twisting. Caps stay on really good.
Seems they secure good enough for multiple uses without needing to add new hot glue.