<b>This Size is very popular on Skid Steer Bobcat</b> <b>GT-FF Series Couplings Feature</b> New valve design, it cans resistance to damage from high flow and the pressure of impulse that providing advanced performance. Sleeve mechanism is designed to help prevent dirt from entering the internal mechanism and thus causing faulty operation when connecting or disconnecting. The sleeve covers the retaining ring and also incorporates a dust seal in the spring area. Hardened nipples and sleeves and solid bar stock construction make for a quality couplings with maximum resistance to damage from hydraulic and mechanical shock. This anti-blowout nitrile/PTFE bonded seal is designed to prevent blow-out or damage during severe service conditions. Durable ball-locking mechanism assures reliable connection every time. A large number of locking balls distributes and workload evenly while providing align mental swiveling action to reduce hose torque and prolong hose life. CAUTION: These Products are not to be used as swivels; rotation under pressure will result in excessive and premature wear. GT-FF Series Couplings employ flush valving when connecting or disconnecting. This means that the valves are mated together so that only small amounts of fluid can be lost during disconnection or air inclusion during reconnection GT-FF Series Conforms to the standard ISO16028 Parker FE Series Male: FEM-502-8FP Female: FEM-501-8FP Faster FFH Series Male: FFH08 12NPT M Female: FFH08 12NPT F Eaton Aeroquip FD89 Series Male: FD89-1002-08-08 Female: FD89-1001-08-08 Safeway FFE49 Series Male: FFE491-4 Female: FFE495-4