SUNLU Carbon Fiber PETG Filament - 10% Carbon Fiber Reinforced for Enhanced Strength, Stiffness & Heat Resistance, Industrial-Grade Matte Black,Fits Most FDM Printers,1KG (Black)

Well-known as much for their S1/S2 filament dryers as for the filament itself. The material catalog — PLA, PETG, ABS, TPU, silk — is broad and frequently discounted on Amazon. Solid all-around option.