Versatile Coupling: Flange coupling connector provides a secure connection for keyed shafts and works seamlessly 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 secures the shaft to a flat surface and allows easy installation of additional accessories. Premium Quality: Shaft axis fittings are professionally manufactured for stable performance and long service life. Specification: Material: Zinc Alloy Size: Outer diameter 5.68 cm (2.24 inches), hole diameter 1.8 cm (0.71 inches) Package Includes: 1 x Flange Coupling Note: Please allow slight measurement deviations due to manual measurement and differences in display monitors.