One of the most compact fittings for 15.9 / 11.1 mm and 16/12mm tubing. Virtually no key socket mounting respectively knurling is visible anymore, only when the union nut is removed the ingenious construction becomes visible.

Technical specifications:
Thread Size: G1 / 4 "
Material: Silver nickel plated brass
Pants size compatibility: 15.9 / 11.1 mm and 16/12mm
Thread length: 4mm
Height without thread: 23mm

Here an impression how the black nickel-plated fittings look like when installed