Amazon.com: HATCHBOX 1.75mm Black PLA 3D Printer Filament, 1 KG Spool, Dimensional Accuracy +/- 0.03 mm, 3D Printing Filament : Industrial & Scientific
Low Cost 3D Printer Filament Spool Stand : 6 Steps - Instructables
Hanging filament spool holder by RNLDNKP | Download free STL model | Printables.com
Overture PLA 3D Printer Filament 1.75mm-2KG – Overture 3D
The 3D Printing Filament Spool Standard: Light-weight, stackable, standard spool design could take hold soon - 3DPrint.com | The Voice of 3D Printing / Additive Manufacturing
Spool dimensions - Spectrum Filaments
Filament dryboxes and alternative spool holders - not only for MMU2S - Original Prusa 3D Printers