ELEGOO Official US via Amazon has for Prime Members: 4KG (4x 1KG) Elegoo Rapid 1.75mm PETG Filament (Black) for $40.77. Shipping is free.

Features:

• Fit for both regular printers and high speed printers, perfectly for most 1.75mm printers such as Neptune 4, Neptune 4 pro/plus/max, K1 series, Ender 3 V2, Kobra 2 series, M5, M5C and more
• With enhanced fluidity, ELEGOO RAPID PETG filament melts rapidly and flows smoothly, allowing for up to 600mm/s fast printing speed
• Full mechanical winding and strict manual inspection ensures that all rapid petg filaments are neatly wound, effectively reduces tangles and snap issues. Please use it as soon as possible after unpacking, dry it completely before using again