Features： 1、20Pcs in Total: There are 10pcs PC4‑M6 fitting for extruder, and 10pcs PC4‑10 fitting for hot end, the replacement is easier. 2、Reliable Works: Allows for quick connection, the pneumatic fittings can withstand greater impact without falling off. 3、Extensive Uses: Suits ly for Creality Ender 3, for 3 Pro, for 3 V2, for Ender 5, for 5 Pro, for 5 Plus CR‑10. 4、Good Materials: The PC4‑M6 fitting is made of brass, while the C4‑10 fitting is made of stainless steel. Has high hardness, very durable with oxidation and corrosion. 5、Easy to Install: The upper part can be inserted into the outer diameter 4mm PTFE tube and self locking, very easy to install. Specification： Item Type: 3D Printer Pneumatic Fitting Model: PC4-M6, PC4-10 PC4-M6 Thread: Approx. 6mm / 0.24in PC4-M6 Inner Diameter (Blue End): Approx. 4mm / 0.16in PC4-M6 Material: Brass PC4-M10 Thread: Approx. 10mm / 0.39in PC4-M10 Inner Diameter (Black End): Approx. 4mm / 0.16in PC4-M10 Material: Stainless Steel + Plastic Compatibility: Suitable for 3D printer 1.75mm filament and other devices. Application: For Creality Ender 3, for 3 Pro, for 3 V2, for Ender 5, for 5 Pro, for 5 Plus CR-10. Package List： 10 x PC4-M6 3D Printer Pneumatic Fitting 10 x PC4-10 3D Printer Pneumatic Fitting