This is a custom-designed modular mini spool for filament samples or color-coded inserts. Engineered with a functional thread mechanism, the spool can be unscrewed and reassembled, allowing you to easily swap the inner filament disc.

One side of the spool is flat and ready for an NFC tag attachment, making it ideal for smart inventory management of filaments, materials, or custom codes.

Perfect for makers, developers, or anyone who wants to track and organize filament samples with a compact and intelligent design.