Bambu re-useable spools twist apart for use with Bambu refill/no spool filaments.
Low Temp (light gray): Suitable for drying at 70 degrees or lower for PLA or PETG Refills.
High Temp (dark gray): Suitable for drying up to 90 degrees for PLA, PETG, ABS, ASA, PA6-GF, ABS-GF, PAHT-CF, PET-CF, PA6-CF, PC, TPU.