Features: Good quality products, ensure working smoothly, security. Made of high quality material, durable use for long-time. High hardness, strong and-tough. Precise hold-cutting. This motor mount bracket owns convenient mounting-holes. Steel material, thickness 3mm, exquisite workmanship, surface-paint-treatment. Specifications: Material:Aluminium Alloy Bottom-surface: 40x43mm Height: 47mm Thickness: 3mm thick aluminum alloy Central aperture: about 12.8mm. Distance between side fixing holes: 25mm Bottom fixed hole spacing: 25mm, 30mm (transverses) Side fixed aperture: M3-hole Bottom fixed aperture: M3-hole. Color:Black For 550 545 555 540 The motor bracket is equipped with 2 screws. Package Includes: 1x Motor Bracket 2x 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. Thanks for your understandings.