General description 40PCS Pneumatic Connector set includes 4mm push-to-connect fittings designed for compressed air applications. This versatile kit features four different shapes: tee, elbow, Y branch, and straight, allowing for a variety of configurations to meet your specific needs. Technical specifications Fluid Type: Air only Applicable Tube: Soft PU/Nylon/PE Tube Pressure Range: 0~145 psi Temperature Range: 0-60°C 32~140°F Material: Quality PU and plastic Installation Easy to install: Simply insert or remove the tube without any tools required. Usage High pressure resistance and long service life, suitable for long-term use. Different styles of fittings cater to various pneumatic piping needs.