The folding sofa hinge is convenient and practical, with excellent texture, and without being easily damaged. The craftsmanship can serve you well without breaking easily. This is a very practical folding sofa hinge. Features -Color:Grey -Material:Iron -Size:10.00X9.00X1.50cm/3.93X3.54X0.59in diameter: 16mm thickness: 2mm Gear thickeness: 2.3mm - Smooth edges design. No pointed edges and corners. More safe and beautiful. - Reasonable structure, large opening and closing angle, easier adjustment, easy to install. - Firmer installation and use, not easy to rust and deform for a long time. - It is fit for connecting the backrest and seat board, bed frame and the bed etc. - It is manufactured with professional technology to ensure the product can work for a long time. Package list: 4 x folding sofa hinges