GEAR: 7 Position Sofa Bed Headrest Adjustable Angle Mechanism Hinge, with One Angle Bracket MATERIAL: metal, anti-rust and -, and sturdy to use, not easy to bend and break. APPLICATION: Suitable for adjusting Sofa backrest Bed Headrest Backrest or you can DIY for your own furniture. FEATURE: Lifting Rod Desk Desktop Adjusting Hinge Angle Hinge. NOTE: Mounting screws are not included. Product Name: Adjustable Angle Hinge Main Color: Bronze Tone Weight: 511g Dimension: 19 x 5 x 7cm / 7.5-inch x 2-inchx 2.8-inch (L*W*H)(Folded) Thickness: 4mm / 0.16-inch Adjustable: 7 Gear Mounting Hole Diameter: 8mm / 0.31-inch, 5mm / 0.2-inch Plate Size: 6 x 5 x 0.3cm / 2.4-inch x 2-inch x 0.1-inch(L*W*T) Package Content: 1 Pair x Adjustable Angle Hinge Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.