Amazon.com: Ewigkeit PTFE Teflon Tube with PC4-M6 Pneumatic Fitting and PC4-M10 Straight Quick in Fitting for 3D Printer 1.75mm Filament(Pack of 9cs) : Industrial & Scientific
How to replace a hotend PTFE tube (MK3S+/MK3S/MK2.5S/MMU2S) | Prusa Knowledge Base