Features: brand new and high quality Built-in roller moving track design, smooth opening and closing, silent operation process. Easy to install, non-fading, and ergonomic design. It can be opened or closed at 180 degrees, and can be hovered at any angle within the range, suitable for installation in various places. The concealed hinge can be completely hidden in the cabinet/folding table/folding door, the appearance is clean and super elegant. The main body is made of zinc alloy, and the shaft is made of stainless steel, which is durable and wear-resistant. Specifications: Material: Zinc Alloy Opening Angle: 0-180 Degree Type: No. 1/No. 2/No. 3/No. 4/No. 5/No. 6/No. 7 Size: As Pictures Shown Package Includes: 1x Hinge(With Screws) note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.