1. Poppet valves available to prevent uncoupled leakage 2. Ball valves available for rugged dependability in heavy-duty hydraulic applications,within rated working pressure 3. Critical parts are induction hardened for durability 4. Dependable ball-locking mechanism holds the mating halves together 5. Socket and plug are precision machined from solid bar stock 6. KZB Series couplings interchange with couplings meeting ISO 7241-1,Series B.