Suitable for connecting armrests and seats, backrests and seats, cushions and backrests, armrests and backrests, bed frames and bed surfaces, etc. < /p> By turning the gears, you can change the armrests, sides, cushions, seats and bed surfaces. Angle adjustment, hidden installation safety, gear opening and closing card design, multiple angles, multiple gears. Size: 2.6 x 2 cm 100% brand new. Function: Used to connect the back of the sofa and the seat back. The height of the sofa backrest can be adjusted to change from a sofa to a bed. Suitable for connecting armrests and seats, backrests and seats, cushions and backrests, armrests and backrests, bed frames and bed surfaces, etc. By turning the gears, you can change the armrests, sides, cushions, seats and bed surfaces. Angle adjustment, hidden installation safety, opening and closing card design, multiple angles, multiple gears. Material: Iron Size: about 2.6 x 2 cm. Color: black. Adjustable: 3 positions. Applications: sofas, sofa beds and other furniture. < p>Package Contents: 1 pair of adjustable sofa hinges Mounting screws The size is measured manually, please allow errors (1-3 cm). Due to different display pixels, there may be color differences, please refer to the actual product. If you are not satisfied after receiving the package, please contact me first, do not leave negative feedback easily, thank you and have a nice day.