3Pcs Pneumatic Fitting, 4Mm Tube OD X 1/4" NPT Push To Connect Pneumatic Fitting

What is it?Pneumatic fittings are connection accessories used in the pneumatic system, often used to connect the interfaces of pneumatic equipment. In 3D printers, pneumatic fittings are usually used to connect tubes related to cooling systems or other pneumatic components.What will I get?Pneumatic Tube FittingsTube Outer Diameter (OD): 4mm / 0.16";Thread Size: NPT 1/4";Thread Length: 8mm / 0.31";Wrench Flat Size: 14mm / 0.55";Overall Height: 18mm / 0.71";Material: Nickel-Plated Copper;Model: PC4-02;Mounting Type: Straight Through Push to Connect;In the package of: 3 Pcs x 3D Printers Pneumatic FittingsAre there any advantages of this product? Easy Installation: The push-to-connect design allows for quick and tool-free installation, making it great for fast setup and maintenance. Outstanding Durability: Made from elected nickel-plated copper material, the fitting provides excellent strength, resistance to corrosion, and long service life. High Pressure Resistance: This pneumatic fitting can withstand strong pressure, not easy to trip, and can work stably in various environments. How to use it?1. Simply push the 4mm tubing into the fitting's connector end until it is securely seated;2. Thread the end of the fitting into the corresponding part of your pneumatic system, tightening it by hand or with a tool as needed;3. Check for any air leakage or loose connections and ensure the tubing is properly inserted.What should I notice?Please ensure that the tubing you use is 4mm to ensure a proper fit.