Usage Tips:Optimized Performance: Enhance your 3D printer's functionality with our high precision rigid coupling. This essential component is designed to connect your stepper motor to the lead screw without any play, ensuring accurate and smooth motion fer. Durable Material: Made from premium aluminium alloy, our shaft coupler is built to withstand rigorous use, ensuring long-lasting reliability and performance in your 3D printing projects. Universal Compatibility: The make it versatile for a wide range of 3D printers and stepper motors, providing a secure fit and easy installation. Enhanced Precision: By minimizing the mechanical play, our coupler ensures that your 3D printer operates at its highest level of precision, resulting in improved print quality and consistency. Outer diameter: 20mm Height: 25mm Horizontal groove: 0.1mm Inner diameter: 5x8mm, 8x8mm Due to different batches, there may be differences in product appearance and printed text, Specified appearance and printed text are not accepted,which will not affect use Colour:As Shown Material:Aluminum Alloy Package Contents: 10 x Shaft Coupler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.