Prusa Research Prusament PETG Jet Black 1kg
Prusament PETG is Prusa's own in-house made filament. The whole manufacturing process is closely monitored and tested - they guarantee ±0.02mm precision and highly-consistent colors. You can inspect parameters of every spool they made at prusament.com. Check the sample spool!
PETG Jet Black is a color used on Original Prusa i3 printers.