PLA Basic, Pre-Dried Refill Filament 1kg (2.2lbs) for Reusable Spools Spool-Less 3D Printing Filament, Compatible with Bambu Lab 3D Printers – Black

Bambu spools carry an RFID chip that the AMS reads for automatic material settings — buy these if you want zero-fuss multi-color on a Bambu printer. Dimensional tolerance is held to ±0.02 mm; refill spools are available if you want to cut plastic waste.