1. The lock sleeves are hardened, pressure resistant and fatigue resistant. 2. Adopts two-stage sealing,no leaking and more reliable. 3. With safety lock function,ensures no fault . 4. Made of plated steel material,more . 5. The quick coupling can withstand 70Mpa of pressure. Spec: Item Type:Quick Disconnect Hydraulic Coupling Material: Plated Steel Thread:Zg3/8 Pressure Endurance:70Mpa packing list: 1 x Male Coupling 1 x Female Coupling The Quick Coupling Can Withstand 70Mpa Of Pressure. The lock sleeves are hardened, pressure resistant and fatigue resistant. With safety lock function,ensures no fault . Adopts twO stage sealing,no leaking and more reliable. SAFETY : Hydraulic coupling set with safety lock function,ensures no fault .