Filament spool adapter

This is an adapter to fit my filament spools onto my 8mm holder's axle...
There is one version with internal reinforcement to the joint at the base.
Inner core of spool from 45mm to 60mm

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I created these links where you can find all common filaments and spare parts at the best prices. These are just links to selected eBay and Aliexpress items, where I normally buy spare parts and materials