4-inch hinge

### Product Highlights of 4-inch Split-type Damping Hinge - **Innovative Structure**: Pioneering split - structure linkage ensures smooth and reliable operation. - **Ultra - Small Shaft Diameter**: Boasts an industry - leading 18.5mm shaft diameter, representing high technical content. - **Temperature Resistance**: Maintains consistent closing speed even in extreme temperatures ranging from - 30°C to 60°C. - **Advanced Transmission**: Features innovative bead - type transmission for enhanced durability and stability. - **Replaceable Components**: Springs and dampers are replaceable, allowing for easy maintenance and extended product life. - **Integrated Buffering**: Built - in damping buffer provides silent locking, automatic door closing, and effective positioning. - **User - Friendly Installation**: No need for adjustment during installation, and the process can be completed in just 3 simple steps. - **Versatile Application**: Suitable for various door types including fire doors, wooden doors, entrance doors, and aluminum alloy doors. - **Long Service Life**: Capable of withstanding up to 150,000 open - and - close cycles, ensuring long - term reliability. - **Eco - Friendly & Durable Material**: Constructed from space aluminum, it is durable, eco - friendly, and offers a load - bearing capacity of ≥25Kg per slice.