Reusable cardboard spool center insert

I am introducing you to the Center hollow ring for recycled spools (3D filament spool made from cardboard). The original idea comes from Lostboyslab but this model is my own 3d model made in Rhino and scaled to fit perfectly on Reflowfilament (https://reflowfilament.com/ourshop/) from The Netherlands. This ring is perfect for making your cardboard spools stronger and slides perfectly on your holder/stand. And it is reusable

You can buy the lostboyslab product at:

https://www.lostboyslab.shop/collections/printer-hacks/products/center-hollow-ring-for-recycled-spools-cardboard

I made my print with PLA prusaments 0,25mm draft on Prusa mini. Scale the model in Prusaslicer for a perfect fit for your spool.