Packing quantity: 5pcs hinges Specifications: insertion/insertion/complete stacking/half stacking Advantages: damped hydraulic hinge, provides cushioning performance, uses liquid, thickened solid booster arm, even opening and closing strength, even load-bearing support force. Silent cushioning: hydraulic copper cylinder, cushioning hinges, cushioning reduces noise. Material: cold-rolled steel, not easy to rust, high temperature processing, stable color., Manufacturer: Shun Yingtong