FF series is the evolution of Free Fit technology and quality applied to flat face couplings. The series has a internal design combined with a high resistance material to allow the achievement of higher operating pressure and minimal pressure drop. The modular structure allows the flexibility to offer several types of threads or special ports in order to satisfy diverse applications while maintaining a compact dimension. These features make FF series couplings the leader in many hydraulics applications where high performance is necessary with the elimination of fluid loss and contamination in the circuit.