This HYDROLICO ZPC06-01P is a straight plastic fitting designed for pneumatic systems. It features a 6mm outer diameter tube connection and a PT1/8 thread for secure and reliable connections in your pneumatic applications.The HYDROLICO ZPC06-01P is a straight plastic fitting with a 6mm OD (Outer Diameter) tube connection and a PT1/8 thread. It is suitable for pneumatic applications.