Flat face couplings, connectable under residual pressure. Real 35 MPa (5076 psi) max working pressure. ISO 16028 interchange. Zinc-Nickel plating. It is possible to couple either a 3FFH female half under pressure with a FFH male half, or a 3FFH male half under pressure with a FFH female half. The 1/2" size, one of the most popular diameters used for compact excavators and tracked/wheeled loaders equipment, is now available in a compact version (3FFK) with a 20 mm shorter body, to suit applications characterized by longitudinal space constraints. 3FFK offers same technical performances as 1/2" male couplings belonging to 3FFH series.