Versatile Coupling: Flange coupling connector provides a secure connection for keyed shafts and works well with omni wheels, enhancing the functionality of your robot or mechanical system Zinc Alloy Construction: Flange coupling is made of zinc alloy to ensure reliable performance in various applications Package: Includes 1 flange shaft coupling to meet your project or repair needs Function: Motor guide shaft support coupler can fix the shaft to a flat surface and allows for easy installation of additional components Premium Quality: Shaft fittings are precisely manufactured for stable performance and extended service life Specification: Material: Zinc Alloy Size: Outer diameter 5.68 cm / 2.24 inches, hole diameter 1.8 cm / 0.71 inch Package Includes: 1 x Flange Coupling Note: Please allow slight measurement deviations due to manual measurement and variations in display screens