Description: Adjustable: Angle lifting rod adjusting hinge bracket. Material: high quality steel iron, rust resistance,sturdy, durable and practical. Application: Suitable for lifting sofa backrest, folding bed and other folding furniture Features: This lifting hinge adjustable connectors for connecting the backrest and seat board,bed frame and the bed etc. Easy to Install: According to the specifications of the hole, set the size, and then fix with screws. Specification: Material: Iron Size Chart: 7 Gears Hinge Length: 28.5cm /11.22inch Total Length: 18cm/7.09inch 10 Gear Hinge Length:39.8cm /15.67inch Total Length: 23.8cm /9.37inch Package Includes: 2 Lifting Rod Hinge(Left and Right) Note: Please allow slightly errors due to manual measurement and different monitors. _x000D_ Due to differences in shooting equipment, displays, and production batches, the product may have slight color differences. This is normal, please refer to the actual product. We have tried our best to restore the true color through professional equipment, but we still recommend that you watch it under natural light for the most accurate visual effect.