Nevonexpress supplies high quality 5mm Male Thread 4mm Push in Joint Air Pneumatic Connector online. Intended for Polyurethane or Nylon tubing. Even the management of this tube can be altered. Elliptical release ring assists to link tube readily by manual, no special tools needed. External (and Interior where appropriate) hexagonal wrench tightening. These Quick fittings are employed for industrial automation systems, pneumatic systems and cannot be implemented on any medicinal gear.