This spacer is designed to ensure an optimal and tight fit of Prusament filament spools on Recreator 3D spool cores. By eliminating unwanted play and movement of the spool during 3D printing, this practical accessory contributes to a more stable and even filament supply. This is crucial for achieving consistent and reliable print results, as it minimises vibrations and potential errors that can arise from a loose spool. Installing the spacer improves overall print quality and reduces the risk of interruptions. With this simple but effective solution, your Recreator 3D spool core works even more efficiently as a reliable spool holder, keeping your filament spool securely in place. It gives you peace of mind so you can focus fully on your 3D printing projects without unnecessary worries about spool issues.