Koolance (patent-pending) quick disconnect no-spill coupling with automatic shutoff. 13mm (1/2) ID, 19mm (3/4) OD male straight connection with compression fitting. It will only fit a Koolance QD3 female shutoff valve. After pulling the ring on the female QDC side, the quick-disconnect no-spill 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) @ 25C. Maximum operating temperature is 100C (212F). General Weight 0.16 lb (0.07 kg) Dimensions 1.00 x 1.00 x 1.00 in (2.54 x 2.54 x 2.54 cm) Software - qd3_o1.gif Diagram - qd3-m13x19_d1.pdf