Features: Our aluminum alloy rigid coupling guaranteesprecise performances, low rotational inertias, and high sensitivity. It is an essential component for small scale CNCmachines and 3D printers. With its simple designs and lightweight constructions, our coupling is effortless to install and requires minimal upkeeps. It is resistant to oilstain and corrosion, ensuring long lasting functionality. Whether you are a DIY enthusiasts or a small manufacturer, our coupling is perfect for your projects. It simplifies the debugging process and provides reliable power transmission. Our coupling find wide application in small CNCmachines and 3D printers, specifically on the Zaxis. Its high torques rigidity, sensitivity, and resistance to oilstain make it an indispensable component for smooth operation. Crafted from high quality aluminum alloy, our coupling ensures exceptional durability. It can withstand significant torques transmission and offer a long service life, making it a reliable choice for various applications. Specifications: Material:Aluminium Alloy Size:Approx.8x8mm Size:Approx.6.35x10mm Size:Approx.10x10mm Size:Approx.8x10mm Size:Approx.8x12mm Size:Approx.10x12mm Size:Approx.12x15mm Size:Approx.10x14mm Size:Approx.6.35x8mm Color:Silver Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Rigid Shaft Coupler