Feature: 1. Small Four Post Module Mounting Base: There is an M4 threaded hole on each surface of each of the four raised columns. Because of these threaded holes, it provides a very flexible and stable installation and fixation method. 2. Center hole: The diameter is 14mm. On one side of the center hole, there is a notch with a diameter of 16mm and a depth of 1mm, which can be used to install flanged spherical bearings. 3. Multifunctional: The width is 27mm and the length is 43mm. It can be installed on both sides of the beam and in the notch space of the U shaped beam, and provides Zhouyu standard hole patterns on multiple surfaces to fix other components. 4. Applicability: Used as parts of robots or mechanical models, etc. Translation and tilting components for horizontal surface installation. 5. Multipurpose: Servo brackets for shoulders, knees or other joints such as humanoid robots and biped robots. Specification: Item Type: Robot Bracket Material: Zinc Alloy Mounting Base Size: Approx. Length: 43mm / 1.7in Width: 27mm / 1.1in Height: 12mm / 0.5in Center Aperture: Approx.14mm / 0.55in Threaded Hole Model: Approx.M4 x 0.7mm / 0.03in. Package List: 2 x Robot Bracket Note: Match the right size before use.