High-quality brass material, anti-corrosion, stable and durable, no deformation, non-toxic and tasteless 180 degree rotation, no sharp edge round birch edge design, elegant appearance, sturdy structure and super load-bearing Size: 30mm x 80mm (1.18" x 3.15"), thickness is 2.0mm (0.08") This hinge can withstand more than 50,000 times of opening and closing actions. It can slowly pull the table surface and close it to achieve smooth and silent movement Suitable folding table, computer tables, sewing machines, windows, doors and other furniture accessories