On/off ball valve. Ball valve QH-QS-4-1/8 with QS push-in connector. Hand lever and female thread. These are the on/off valves we use for our PRO Range of air scribes. They are very well made, sturdy, easy to use and reliable. 

• Valve function=2/2 bistable, Pneumatic connection, port 1=R1/8"
• Pneumatic connection, port 2=QS-4
• Type of actuation=manual
• Mounting type=Threaded

1/8 BSP" male thread and 4mm OD push fit (for 4mm polyurethane hose).