These precision CNC-machined aluminum alloy spacer sleeves are essential components for RC model builders and hobbyists seeking professional-grade hardware solutions. Available in multiple standard metric sizes from M3 to M8, these non-threaded stand-off washers provide reliable spacing and support in various assembly applications. The smooth inner wall design allows for seamless insertion of screws and bolts, while the lightweight yet durable aluminum construction offers an optimal strength-to-weight ratio - a crucial factor for RC models where every gram matters. Each spacer is manufactured to exact specifications, ensuring consistent dimensional accuracy and perfect fit every time. The set includes multiple pieces (5-20 count) to accommodate different project needs. These versatile spacers excel at maintaining proper component separation, reducing vibration, and providing structural support in RC models and other precision assembly projects. Their clean, industrial-grade finish and precise machining make them ideal for both functional and aesthetic applications in custom builds.