Features: Heavy duty 42 position sofa adjustment hinge engineered with 210Nm strength ensures durability and stability for long lasting furniture in daily use. 2 degree per gear adjustable, specifically design for 19.1mm diameter/1.2mm thickness steel tubes in furniture assembly. Ideal for homeowners, furniture manufacturers, and commercial space motion control solution for bean bag chairs, recliners, and multifunctional seating units. Perfectly integrates with convertible sofa bed, chairs, and ergonomic seating systems in living room, offices, or hospitality requiring comfort. Good quality iron Component, it have good wear resistance, ensuring good usage in various environment, suitable for use in homes and commercial place. Specifications: Component: Iron Parameters: 42-speed adjustment Size: As shown Practicality: Suitable for various types of sofas, providing diverse backrest adjustment functions to improve usage comfort Use scene: Living room sofa | chair | Office seats and other furniture adjustment needs Package Includes: Sofa adjustment hinge × 1 note: 1.Please allow 0-1cm error due to manual measurement. please make sure you do not mind before you bid. 2.Due to difference between different monitors, the picture may not reflect the actual color of the item. Thank you!