This roller needs 4 bearings 21x15x4. Alternative there are raw model and print profile for 608 skate bearings. To provide a proper fitting of bearings, make sure, that your printer is calibrated.

The long roll length is 110mm and it is suitable for bride spools. The short one is for normal rolls and is 65mm in length.

Also use the the latch with the proper length.

There is also a stand, that allows you to attach rolls on both sides. So you can build a roll stand for more than one spools, for example for a dry box (see pictures).