Koolance (patent-pending) quick disconnect no-spill coupling with automatic shutoff. 10mm (3/8") ID, 16mm (5/8") OD female straight connection with compression fitting. It will only fit a Koolance QD3 male quick disconnect.

After pulling the ring on the female QDC side, the quick-disconnect fittings will separate. Liquid on both sides will be automatically obstructed with approximately 0.2mL freed. Fittings are nickel-plated brass. Maximum operating pressure is 2kgf/cm2 (28.5 psi) @ 25°C. Maximum operating temperature is 100°C (212°F).