Features: 1. Solid steel construction, durable, rust-resistant, healthy and environmentally friendly materials. 2. The hinge surface uses a multi-layer plating process, providing corrosion resistance, wear resistance, and long-lasting durability. 3. Multi-functional design serves as a hinge, door stopper, and door closer. 4. When the door is opened to 90 degrees, the positioning bead engages for stable door positioning. 5. Invisible door hinge with a 90-degree positioning design that automatically closes the door. Note: Actual color may vary slightly due to monitor and lighting differences. Please allow 1-3mm measurement deviation due to manual measurement. Includes: 1 x Spring Hinge