For Creality 3D printers (CR10, CR10S, Ender 3), an extruder connection – Original. This connection is for this Creality Heatsink.
Connection E3D V6 thread M10 Teflon tube 2 / 4mm goes through.
Connection PC4 01 1,75mm is used in 3D printers to connect bowden tubing to extruder and to hotend.