Feature:1. 20Pcs in Total: There are 10pcs PC4M6 fitting for extruder, and 10pcs PC410 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 perfectly for Creality Ender 3, for 3 Pro, for 3 V2, for Ender 5, for 5 Pro, for 5 Plus CR10.4. Good Materials: The PC4M6 fitting is made of brass, while the C410 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, PC4-10PC4-M6 Thread: Approx. 6mm / 0.24inPC4-M6 Inner Diameter (Blue End): Approx. 4mm / 0.16inPC4-M6 Material: BrassPC4-M10 Thread: Approx. 10mm / 0.39inPC4-M10 Inner Diameter (Black End): Approx. 4mm / 0.16inPC4-M10 Material: Stainless Steel + PlasticCompatibility: 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 Fitting10 x PC4-10 3D Printer Pneumatic Fitting