Packing quantity: 10pcs hydraulic hinges Specifications: Semi-stacked/Full-stacked Advantages: damping hydraulic hinge, provide cushioning performance, use liquid, thickened solid booster arm, even opening and closing strength, even load bearing support force. Material: cold-rolled steel, long-term use, not easy to rust, high temperature processing, color stability. Silent buffer: hydraulic copper cylinder, buffer hinge, buffer to reduce noise., Manufacturer: Shun Yingtong